2207466 SzGeCERN 20220810144820.0 DOI JACoW 10.18429/JACoW-IPAC2016-THPMY007 oai:inspirehep.net:1470587 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470587 2016-08-11T09:22:31Z Inspire 1470587 eng CERN-ACC-2016-157 Salemme, Roberto JACoW-00069028 roberto.salemme@cern.ch CERN Vacuum Performance of Amorphous Carbon Coating at Cryogenic Temperature with Presence of Proton Beams 2016 4 p JACoW Amorphous carbon (a-C) coating is the baseline electron multipacting mitigation strategy proposed for the Inner Triplets (IT) in the High Luminosity upgrade of the Large Hadron Collider (HL-LHC). As of 2014, the COLD bore EXperiment (COLDEX) is qualifying the performance of a-C coating at cryogenic temperature in a LHC type cryogenic vacuum system. In this paper, the experimental results following a cryogenic vacuum characterization of a-C coating in the 5 to 150 K temperature range are reviewed. We discuss the dynamic pressure rise, gas composition, dissipated heat load and electron activity observed within an accumulated beam time of 9 Ah. The results of dedicated experiments including pre-adsorption of different gas species (H2, CO) on the a-C coating are discussed. Based of phenomenological modeling, up-to-date secondary emission input parameters for a-C coatings are retrieved for electron cloud build-up simulations. Finally, first implications for the HL-LHC ITs design are drawn. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW electron JACoW cryogenics JACoW vacuum JACoW experiment JACoW simulation CERN CERN HL-LHC Baglin, Vincent INSPIRE-00063812 JACoW-00001745 CERN Bregliozzi, Giuseppe JACoW-00036159 giuseppe.bregliozzi@cern.ch CERN Chiggiato, Paolo JACoW-00035430 paolo.chiggiato@cern.ch CERN ATS THPMY007 IPAC2016 C16-05-08 2016 1238008 858866 http://cds.cern.ch/record/2207466/files/thpmy007.pdf Published version from JACoW 13 2111498 busan20160508 THPMY007 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 22:32:41 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207460 SzGeCERN 20220810144820.0 DOI JACoW 10.18429/JACoW-IPAC2016-THPMW031 oai:inspirehep.net:1470573 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470573 2016-08-11T09:22:30Z Inspire 1470573 eng CERN-ACC-2016-163 Day, Hugo JACoW-00046625 hugo.day@hep.manchester.ac.uk CERN Current and Future Beam Thermal Behaviour of the LHC Injection Kicker Magnet 2016 4 p JACoW During Run 1 of the LHC the injection kicker magnets caused occasional operational delays due to beam induced heating with high bunch intensity and short bunch lengths. Significant upgrades were carried out to the injection kicker magnets during long shutdown 1, including a new design of beam screen to reduce the beam induced heating. Nevertheless these kicker magnets may limit the performance of HL-LHC unless additional, mitigating, measures are taken. Hence extensive simulations have been carried out to predict the distribution of the beam induced power deposition within the magnet and detailed thermal analyses carried out to predict the temperature profiles. To benchmark the simulations the predicted temperatures are compared with observables in the LHC. This paper reports on observations of the thermal behaviour of the magnet during run 2 of the LHC, with 25ns beam. In addition the measurement data is used to extrapolate temperature rise for the beam parameters expected for high-luminosity LHC. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW impedance JACoW kicker JACoW injection JACoW simulation JACoW coupling CERN CERN HL-LHC Barnes, Michael INSPIRE-00064621 JACoW-00000086 CERN Ducimetière, Laurent INSPIRE-00540386 JACoW-00001690 CERN Vega Cid, Lorena JACoW-00085967 lorena.vega@cern.ch CERN Weterings, Wim JACoW-00004260 wim.weterings@cern.ch CERN ATS THPMW031 IPAC2016 C16-05-08 2016 1238002 1358691 http://cds.cern.ch/record/2207460/files/thpmw031.pdf Published version from JACoW 13 2111498 busan20160508 THPMW031 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 22:31:16 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207459 SzGeCERN 20220810144820.0 DOI JACoW 10.18429/JACoW-IPAC2016-THPMW030 oai:inspirehep.net:1470572 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470572 2016-08-11T09:22:30Z Inspire 1470572 eng CERN-ACC-2016-164 Barnes, Michael INSPIRE-00064621 JACoW-00000086 CERN Studies of Impedance-related Improvements of the SPS Injection Kicker System 2016 4 p JACoW The injection kicker system for the SPS consists of sixteen magnets housed in a total of four vacuum tanks. The kicker magnets in one tank have recently limited operation of the SPS with high-intensity beam: this is due to both beam induced heating in the ferrite yoke of the kicker magnets and abnormally high pressure in the vacuum tank. Furthermore, operation with the higher intensity beams needed in the future for HL-LHC is expected to exacerbate these problems. Hence studies of the longitudinal beam coupling impedance of the kicker magnets have been carried out to investigate effective methods to shield the ferrite yoke from the circulating beam. The shielding must not compromise the field quality or high voltage behaviour of the kicker magnets and should not significantly reduce the beam aperture: results of these studies, together with measurements, are presented. In addition results of tests to identify the causes of abnormal outgassing are presented. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW kicker JACoW impedance JACoW simulation JACoW coupling JACoW vacuum CERN CERN HL-LHC Adraktas, Antonios JACoW-00086219 antonios.adraktas@cern.ch CERN Beck, Mario JACoW-00086223 mario.beck@cern.ch CERN Bregliozzi, Giuseppe JACoW-00036159 giuseppe.bregliozzi@cern.ch CERN Day, Hugo JACoW-00046625 hugo.day@hep.manchester.ac.uk CERN Ducimetière, Laurent INSPIRE-00540386 JACoW-00001690 CERN Ferreira Somoza, Jose JACoW-00060242 ja.ferreira@cern.ch CERN Goddard, Brennan INSPIRE-00545979 JACoW-00001570 CERN Kramer, Thomas JACoW-00028413 thomas.kramer@cern.ch CERN Pasquino, Chiara JACoW-00046597 chiara.pasquino@cern.ch CERN Rumolo, Giovanni INSPIRE-00372845 JACoW-00000539 CERN Salvant, Benoit JACoW-00028406 benoit.salvant@cern.ch CERN Sermeus, Luc INSPIRE-00125241 JACoW-00004717 CERN Uythoven, Jan JACoW-00001565 jan.uythoven@cern.ch CERN Vega Cid, Lorena JACoW-00085967 lorena.vega@cern.ch CERN Velotti, Francesco JACoW-00060243 francesco.maria.velotti@cern.ch EPFL-ISIC, Lausanne Weterings, Wim JACoW-00004260 wim.weterings@cern.ch CERN Zannini, Carlo INSPIRE-00372980 JACoW-00039097 CERN ATS THPMW030 IPAC2016 C16-05-08 2016 1238001 1396094 http://cds.cern.ch/record/2207459/files/thpmw030.pdf Published version from JACoW 13 2111498 busan20160508 THPMW030 ARTICLE ConferencePaper 0-0-0-1-1-0-1 2016-06-16 22:31:07 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207447 SzGeCERN 20220810144819.0 DOI JACoW 10.18429/JACoW-IPAC2016-THPMR040 oai:inspirehep.net:1470529 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470529 2016-08-11T09:22:30Z Inspire 1470529 eng CERN-ACC-2016-176 Coello de Portugal, Jaime Maria JACoW-00072848 jcoellod@cern.ch CERN Barcelona, Polytechnic U. Local Optics Corrections in the HL-LHC IR 2016 4 p JACoW For the high luminosity upgrade of the LHC optics correction in the interaction regions is expected to be challenged by the very low β^{*} and the sizable expected quadrupolar errors in the triplet. This paper addresses the performance and limitations of the segment-by-segment technique to correct quadrupolar and skew quadrupolar errors in the HL-LHC IR via computer simulations. Required improvements to this technique and possible combinations with other correction approaches are also presented including experimental tests in the current LHC IR. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW optics JACoW quadrupole JACoW coupling JACoW controls JACoW simulation CERN CERN HL-LHC Carlier, Felix JACoW-00076287 felix.simon.carlier@cern.ch CERN Garcia-Tabares, Ana JACoW-00085372 ana.garcia-tabares.valdivieso@cern.ch CERN Langner, Andy JACoW-00054401 andy.langner@cern.ch CERN Maclean, Ewen JACoW-00044576 ewen.hamish.maclean@cern.ch CERN Malina, Lukas JACoW-00062354 lukas.malina@cern.ch CERN Persson, Tobias JACoW-00051579 tpersson@cern.ch CERN Skowroński, Piotr INSPIRE-00355480 JACoW-00025478 CERN Tomás, Rogelio INSPIRE-00286070 JACoW-00003672 CERN ATS BE THPMR040 IPAC2016 C16-05-08 2016 1237989 695057 http://cds.cern.ch/record/2207447/files/thpmr040.pdf Published version from JACoW 13 2111498 busan20160508 THPMR040 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 22:27:14 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207445 SzGeCERN 20220810144818.0 DOI JACoW 10.18429/JACoW-IPAC2016-THPMR038 oai:inspirehep.net:1470527 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470527 2016-08-11T09:22:30Z Inspire 1470527 eng CERN-ACC-2016-178 Maclean, Ewen JACoW-00044576 ewen.hamish.maclean@cern.ch CERN Non-Linear Errors in the Experimental Insertions of the LHC 2016 4 p JACoW Correction of nonlinear magnetic errors in low-β insertions can be of critical significance for the operation of a collider. This is expected to be of particular relevance to LHC Run II and the HL-LHC upgrade, as well as to future colliders such as the FCC. Current correction strategies for these accelerators have assumed it will be possible to calculate optimized local corrections through the insertions using a magnetic model of the errors. To test this assumption the nonlinear errors in the LHC experimental insertions have been examined via feed-down and amplitude detuning. It will be shown that while in some cases the magnetic measurements provide a sufficient description of the errors, in others large discrepancies exist which will require beam-based correction techniques. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW insertion JACoW multipole JACoW coupling JACoW dipole JACoW dynamic-aperture CERN CERN HL-LHC Carlier, Felix JACoW-00076287 felix.simon.carlier@cern.ch CERN Giovannozzi, Massimo INSPIRE-00084987 JACoW-00001692 CERN Langner, Andy JACoW-00054401 andy.sven.langner@cern.ch CERN Mönig, Saskia JACoW-00086279 saskia.monig@cern.ch CERN Persson, Tobias JACoW-00051579 tpersson@cern.ch CERN Skowroński, Piotr INSPIRE-00355480 JACoW-00025478 CERN Tomás, Rogelio INSPIRE-00286070 JACoW-00003672 CERN ATS BE THPMR038 IPAC2016 C16-05-08 2016 1237987 633456 http://cds.cern.ch/record/2207445/files/thpmr038.pdf Published version from JACoW 13 2111498 busan20160508 THPMR038 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 22:26:45 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207426 SzGeCERN 20220810144815.0 DOI JACoW 10.18429/JACoW-IPAC2016-WEPOR018 oai:inspirehep.net:1470302 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470302 2016-08-11T09:22:28Z Inspire 1470302 eng CERN-ACC-2016-197 Sosin, Mateusz JACoW-00047984 mateusz.sosin@cern.ch CERN Position Monitoring System for HL-LHC Crab Cavities 2016 3 p JACoW The high luminosity upgrade for the LHC at CERN (HL-LHC project) will extend the discovery potential of the LHC by a factor 10. It relies on key innovative technologies like superconducting cavities for beam rotation, named 'crab cavities'. Two crab cavities will be hosted in a superconducting cryostat working at a cold (<3 K). The position of each cavity will be monitored during the cool-down and the operation in order to comply with the tight alignment tolerances: the misalignment of a cavity axis w.r.t. the other will have to be lower than 0.5 mm and each cavity roll w.r.t. the cryostat axis will have to be lower than 1 mrad. Moreover, the monitoring system will have to be radiation hard (up to 10 MGy) and maintenance free. We propose a solution based on the Frequency Scanning Interferometry to provide the position monitoring of the crab cavities. This paper describes the design and study of such a solution, including the engineering approach, the issues encountered and the lessons learnt. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW cavity JACoW monitoring JACoW vacuum JACoW radiation JACoW alignment CERN CERN HL-LHC Dijoud, Thibault JACoW-00081875 thibault.dijoud@cern.ch CERN Mainaud Durand, Helene JACoW-00036292 helene.mainaud.durand@cern.ch CERN Rude, Vivien JACoW-00055696 vivien.rude@cern.ch Unlisted, FR ATS WEPOR018 IPAC2016 C16-05-08 2016 1237968 1123470 http://cds.cern.ch/record/2207426/files/wepor018.pdf Published version from JACoW 13 2111498 busan20160508 WEPOR018 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 22:02:23 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207409 SzGeCERN 20220810144812.0 DOI JACoW 10.18429/JACoW-IPAC2016-WEPMW030 oai:inspirehep.net:1470240 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470240 2016-08-11T12:13:47Z Inspire 1470240 eng CERN-ACC-2016-216 Mirarchi, Daniele JACoW-00044537 daniele.mirarchi@cern.ch CERN Cleaning Performance of the Collimation System of the High Luminosity Large Hadron Collider 2016 4 p JACoW Different upgrades of the LHC will be carried out in the framework of the High Luminosity project (HL-LHC), where the total stored energy in the machine will increase up to about 700 MJ. This unprecedented stored energy poses serious challenges for the collimation system, which was designed to handle safely up to about 360 MJ. In this paper the baseline collimation layout for HL-LHC is described, with main focus on upgrades related to the cleaning of halo and physics debris, and its expected performance is discussed. The main upgrade items include the presence of new collimators in the dispersion suppressor of the betatron cleaning insertion installed between two 11 T dipoles, and two additional collimators for an improved local protection of triplet magnets. Thus, optimized settings for the entire and upgraded collimation chain were conceived and are shown here together with the resulting cleaning performance. Moreover, the cleaning performance taking into account crab cavities it is also discussed. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW collimation JACoW ion JACoW insertion JACoW luminosity JACoW simulation CERN CERN HL-LHC Appleby, Robert INSPIRE-00193766 JACoW-00012696 U. Manchester (main) Bertarelli, Alessandro JACoW-00005409 alessandro.bertarelli@cern.ch CERN Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN Garcia Morales, Hector INSPIRE-00474859 JACoW-00048252 Royal Holloway, U. of London Hermes, Pascal JACoW-00074053 phermes@cern.ch CERN Kwee-Hinzmann, Regina INSPIRE-00218654 JACoW-00064772 Royal Holloway, U. of London Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN Mereghetti, Alessio JACoW-00036877 alessio.mereghetti@cern.ch CERN Quaranta, Elena JACoW-00060072 elena.quaranta@cern.ch CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN ATS WEPMW030 IPAC2016 C16-05-08 2016 1237951 261130 http://cds.cern.ch/record/2207409/files/wepmw030.pdf Fulltext 13 2111498 busan20160508 WEPMW030 ARTICLE ConferencePaper 0-0-0-0-0-0-0 2016-08-11 14:09:57 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207400 SzGeCERN 20220810144810.0 10.18429/JACoW-IPAC2016-WEPMR038 DOI JACoW oai:inspirehep.net:1470198 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1470198 2016-08-11T09:22:26Z Inspire 1470198 eng CERN-ACC-2016-225 Verdú-Andrés, Silvia RIKEN BNL sverdu@bnl.gov JACoW-00062087 Frequency Tuning for a DQW Crab Cavity 2016 3 p The nominal operating frequency for the HL-LHC crab cavities is 400.79 MHz within a bandwidth of ±60kHz. Attaining the required cavity tune implies a good understanding of all the processes that influence the cavity frequency from the moment when the cavity parts are being fabricated until the cavity is installed and under operation. Different tuning options will be available for the DQW crab cavity of LHC. This paper details the different steps in the cavity fabrication and preparation that may introduce a shift in the cavity frequency and introduces the different tuning methods foreseen to bring the cavity frequency to meet the specifications. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings cavity JACoW operation JACoW simulation JACoW SRF JACoW insertion JACoW CERN CERN HL-LHC Artoos, Kurt CERN ORCID:0000-0003-1821-2426 JACoW-00005883 Ben-Zvi, Ilan SUNY, Stony Brook RIKEN BNL JACoW-00002135 Calaga, Rama CERN JACoW-00003654 Capatina, Ofelia CERN JACoW-00001541 Leuxe, Raphael CERN JACoW-00046440 Skaritka, John RIKEN BNL JACoW-00005658 Wu, Qiong RIKEN BNL JACoW-00028107 Xiao, Binping RIKEN BNL JACoW-00039713 Zanoni, Carlo CERN JACoW-00080618 ATS IPAC2016 WEPMR038 C16-05-08 2016 1237942 695271 http://cds.cern.ch/record/2207400/files/wepmr038.pdf Published version from JACoW 13 2111498 busan20160508 WEPMR038 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:48:34 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207385 SzGeCERN 20220810144914.0 10.18429/JACoW-IPAC2016-TUPMW035 DOI JACoW oai:inspirehep.net:1469944 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469944 2016-08-11T09:22:25Z Inspire 1469944 eng CERN-ACC-2016-240 Medina Medrano, Luis CICATA-Legaria, IPN medinamluis@fisica.ugto.mx JACoW-00074732 Performance and Operational Aspects of HL-LHC Scenarios 2016 4 p Several alternatives to the present HL-LHC baseline configuration have been proposed, aiming either to improve the potential performance, reduce its risks, or to provide options for addressing possible limitations or changes in its parameters. In this paper we review and compare the performance of the HL-LHC baseline and the main alternatives with the latest parameters set. The results are obtained using refined simulations of the evolution of the luminosity with β^{*}-levelling, for which new criteria have been introduced, such as improved calculation of the intrabeam scattering and the addition of penalty steps to take into account the necessary time to move between consecutive optics during the process. The features of the set of optics are discussed for the nominal baseline. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings luminosity JACoW optics JACoW simulation JACoW emittance JACoW electron JACoW CERN CERN HL-LHC Tomás, Rogelio CERN INSPIRE-00286070 JACoW-00003672 ATS BE IPAC2016 TUPMW035 C16-05-08 2016 1237927 386284 http://cds.cern.ch/record/2207385/files/tupmw035.pdf Published version from JACoW 13 2111498 busan20160508 TUPMW035 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:22:41 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207384 SzGeCERN 20220810144800.0 10.18429/JACoW-IPAC2016-TUPMW034 DOI JACoW oai:inspirehep.net:1469943 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469943 2016-08-11T09:22:25Z Inspire 1469943 eng CERN-ACC-2016-241 Calaga, Rama CERN rama.calaga@cern.ch JACoW-00003654 A 200 MHz SC-RF System for the HL-LHC 2016 3 p A quarter wave β=1 superconducting cavity at 200 MHz is proposed for the LHC as an alternative to the present 400 MHz RF system. The primary motivation of such a system would be to accelerate higher intensity and longer bunches with improved capture efficiency. Advantages related to minimizing electron cloud effects, intra-beam scattering, heating and the possibility of luminosity levelling with bunch length are described. Some considerations related to cavity optimization, beam loading and technological challenges are addressed. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings cavity JACoW emittance JACoW injection JACoW luminosity JACoW impedance JACoW CERN CERN HL-LHC Tomás, Rogelio CERN INSPIRE-00286070 JACoW-00003672 ATS BE IPAC2016 TUPMW034 C16-05-08 2016 1237926 1266524 http://cds.cern.ch/record/2207384/files/tupmw034.pdf Published version from JACoW 13 2111498 busan20160508 TUPMW034 ARTICLE ConferencePaper 0-0-0-3-0-0-1 2016-06-16 20:22:31 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207377 SzGeCERN 20220810144759.0 DOI JACoW 10.18429/JACoW-IPAC2016-TUPMW025 oai:inspirehep.net:1469936 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469936 2016-08-11T09:22:25Z Inspire 1469936 eng CERN-ACC-2016-248 Santamaría García, Andrea JACoW-00068969 andrea.santamaria@cern.ch CERN Machine Protection from Fast Crab Cavity Failures in the High Luminosity LHC 2016 4 p JACoW The time constant of a crab cavity (CC) failure can be faster than the reaction time of the active protection system. In such a scenario, the beams cannot be immediately extracted, making the the protection of the machine rely on the passive protection devices. At the same time, the energy stored in the High Luminosity (HL) LHC beams will be doubled with respect to the LHC to more than 700 MJ, which increases the risk of damaging the machine and the experiments in a failure scenario. In this study we estimate the impact that different CC failures have on the collimation system. We also give a first quantitative estimate of the effect of these failures on the elements near the experiments based on FLUKA simulations, using an updated HL-LHC baseline. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW cavity JACoW collimation JACoW proton JACoW simulation JACoW luminosity CERN CERN HL-LHC Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Burkhardt, Helmut JACoW-00001681 helmut.burkhardt@cern.ch CERN Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN Kwee-Hinzmann, Regina INSPIRE-00218654 JACoW-00064772 CERN Royal Holloway, U. of London Royal Holloway, University of London, Surrey, United Kingdom Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN Sjobak, Kyrre JACoW-00055115 kyrre.ness.sjoebaek@cern.ch CERN Tsinganis, Andrea JACoW-00088691 andrea.tsinganis@cern.ch CERN ATS BE TUPMW025 IPAC2016 C16-05-08 2016 1237919 1133505 http://cds.cern.ch/record/2207377/files/tupmw025.pdf Published version from JACoW 13 2111498 busan20160508 TUPMW025 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:21:33 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207369 SzGeCERN 20220810143846.0 10.18429/JACoW-IPAC2016-TUPMW016 DOI JACoW oai:inspirehep.net:1469928 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469928 2016-08-11T09:22:24Z Inspire 1469928 eng CERN-ACC-2016-256 Romano, Annalisa CERN annalisa.romano@cern.ch JACoW-00068795 Effect of the LHC Beam Screen Baffle on the Electron Cloud Buildup 2016 4 p Electron Cloud (EC) has been identified as one of the major intensity-limiting factors in the CERN Large Hadron Collider (LHC). Due to the EC, an additional heat load is deposited on the perforated LHC beam screen, for which only a small cooling capacity is available. In order to preserve the superconducting state of the magnets, pumping slots shields were added on the outer side of the beam screens. In the framework of the design of the beam screens of the new HL-LHC triplets, the impact of these shields on the multipacting process was studied with macroparticle simulations. For this purpose multiple new features had to be introduced in the PyECLOUD code. This contribution will describe the implemented simulation model and summarize the outcome of this study. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings electron JACoW simulation JACoW shielding JACoW proton JACoW dipole JACoW CERN CERN HL-LHC Iadarola, Giovanni CERN INSPIRE-00372835 JACoW-00055302 Li, Kevin CERN kevin.shing.bruce.li@cern.ch JACoW-00036104 Rumolo, Giovanni CERN INSPIRE-00372845 JACoW-00000539 ATS BE IPAC2016 TUPMW016 C16-05-08 2016 1237911 6267969 http://cds.cern.ch/record/2207369/files/tupmw016.pdf Published version from JACoW 13 2111498 busan20160508 TUPMW016 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2016-06-16 20:20:06 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207366 SzGeCERN 20220810144754.0 DOI JACoW 10.18429/JACoW-IPAC2016-TUPMW013 oai:inspirehep.net:1469925 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469925 2016-08-11T12:13:49Z Inspire 1469925 eng CERN-ACC-2016-259 Gorzawski, Arkadiusz JACoW-00060710 arkadiusz.gorzawski@cern.ch CERN Experimental Demonstration of β* Leveling at the LHC 2016 4 p JACoW The HL-LHC project foresees to boost the LHC peak luminosity beyond the capabilities of the LHC experimental detectors. Leveling the luminosity down to a constant value that is sustainable for the experiments is therefore the operational baseline of HL-LHC. Various luminosity leveling techniques are available at the LHC. Leveling by adjusting β^{*}, the betatron function at the interaction point, to maintain a constant luminosity is favorable because the beams remain head-on which provides optimal stability from the point of view of collective effects. Smooth leveling by β^{*} requires however excellent control of the beam orbits and beam losses in the interaction regions since the beam offsets should not vary by more than around one r.m.s. beam size during the process. This leveling scheme has been successfully tested and experimentally demonstrated during the LHC machine development program in 2015. This paper presents results on luminosity leveling over a β^{*} range from 10 m to 0.8 m and provides an outlook on future developments and use of this technique at the LHC. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW betatron JACoW controls JACoW experiment JACoW emittance CERN CERN HL-LHC Mirarchi, Daniele JACoW-00044537 daniele.mirarchi@cern.ch CERN Salvachua, Belen INSPIRE-00222882 JACoW-00057859 CERN Wenninger, Jorg INSPIRE-00135481 JACoW-00001650 CERN ATS BE TUPMW013 IPAC2016 C16-05-08 2016 1237908 827945 http://cds.cern.ch/record/2207366/files/tupmw013.pdf Fulltext 13 2111498 busan20160508 TUPMW013 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-08-11 14:11:12 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207362 SzGeCERN 20220810144754.0 oai:inspirehep.net:1469921 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS DOI JACoW 10.18429/JACoW-IPAC2016-TUPMW007 http://inspirehep.net/oai2d oai:inspirehep.net:1469921 2016-08-11T09:22:24Z 2016-08-12T04:00:08Z marcxml Inspire 1469921 eng CERN-ACC-2016-263 Crouch, Matthew JACoW-00068968 matthew.crouch@cern.ch U. Manchester (main) Impact of Long Range Beam-Beam Effects on Intensity and Luminosity Lifetimes from the 2015 LHC Run 2016 4 p JACoW Luminosity is one of the key parameters that determines the performance of colliding beams in the Large Hadron Collider (LHC). Luminosity can therefore be used to quantify the impact of beam-beam interactions on the beam lifetimes and emittances. The High Luminosity Large Hadron Collider (HL-LHC) project aims to reach higher luminosities, approximately a factor of 7 larger than the nominal LHC at peak luminosity without crab cavities. Higher luminosities are achieved by increasing the bunch populations and reducing the transverse beam sizes. This results in stronger beam-beam effects. Here the LHC luminosity and beam intensity decay rates are analysed as a function of reducing beam separation with the aim of characterising the impact of beam-beam effects on the luminosity and beam lifetime. The analysis and results are discussed with possible application to the HL-LHC upgrade. publication CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW emittance JACoW experiment JACoW hadron JACoW dynamic-aperture CERN CERN HL-LHC Appleby, Robert INSPIRE-00193766 JACoW-00012696 U. Manchester (main) Banfi, Danilo INSPIRE-00211081 JACoW-00060450 EPFL-ISIC, Lausanne Barranco, Javier INSPIRE-00331297 JACoW-00028384 CERN Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Buffat, Xavier JACoW-00046847 xavier.buffat@cern.ch CERN Muratori, Bruno JACoW-00005356 bruno.muratori@stfc.ac.uk Daresbury Pojer, Mirko JACoW-00033394 mirko.pojer@cern.ch CERN Salvachua, Belen INSPIRE-00222882 JACoW-00057859 CERN Tambasco, Claudia JACoW-00068755 claudia.tambasco@cern.ch EPFL-ISIC, Lausanne Trad, Georges JACoW-00051533 georges.trad@cern.ch CERN ATS TUPMW007 IPAC2016 C16-05-08 2016 1237904 230338 http://cds.cern.ch/record/2207362/files/tupmw007.pdf Published version from JACoW 13 2111498 TUPMW007 busan20160508 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:19:15 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207357 SzGeCERN 20220810144752.0 10.18429/JACoW-IPAC2016-TUPMW002 DOI JACoW oai:inspirehep.net:1469916 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469916 2016-08-11T09:22:24Z Inspire 1469916 eng CERN-ACC-2016-268 Antoniou, Fanouria CERN fanouria.antoniou@cern.ch JACoW-00035373 LHC Luminosity Modeling for RUNII 2016 4 p After a long shut-down (LS1), LHC restarted its operation on April 2015 at a record energy of 6.5TeV, achieving soon a good luminosity performance. In this paper, a luminosity model based on the three main components of the LHC luminosity degradation (intrabeam scattering, synchrotron radiation and luminosity burn-off), is compared with data from runII. Based on the observations, other sources of luminosity degradation are discussed and the model is refined. Finally, based on the experience from runI and runII, the model is used for integrated luminosity projections for the HL-LHC beam parameters. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings luminosity JACoW emittance JACoW radiation JACoW scattering JACoW proton JACoW CERN CERN HL-LHC Arduini, Gianluigi CERN INSPIRE-00163703 JACoW-00001676 Hostettler, Michael CERN michael.hostettler@cern.ch JACoW-00060749 Lamont, Mike CERN INSPIRE-00099793 JACoW-00001663 Papadopoulou, Stefania CERN stefania-parthena.papadopoulou@cern.ch JACoW-00077140 Papaphilippou, Yannis CERN INSPIRE-00056849 JACoW-00000197 Papotti, Giulia CERN giulia.papotti@cern.ch JACoW-00035342 Pojer, Mirko CERN mirko.pojer@cern.ch JACoW-00033394 Salvachua, Belen CERN INSPIRE-00222882 JACoW-00057859 Wyszynski, Michal CERN michal.wyszynski@cern.ch JACoW-00086052 ATS BE IPAC2016 TUPMW002 C16-05-08 2016 1237899 540034 http://cds.cern.ch/record/2207357/files/tupmw002.pdf Published version from JACoW 13 2111498 busan20160508 TUPMW002 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:18:35 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207352 SzGeCERN 20220810144751.0 10.18429/JACoW-IPAC2016-TUPMR048 DOI JACoW oai:inspirehep.net:1469903 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469903 2016-08-11T09:22:23Z Inspire 1469903 eng CERN-ACC-2016-273 Goddard, Brennan CERN INSPIRE-00545979 JACoW-00001570 SPS Injection and Beam Quality for LHC Heavy Ions With 150 ns Kicker Rise Time 2016 3 p As part of the LHC Injectors Upgrade project for LHC heavy ions, the SPS injection kicker system rise time needs reduction below its present 225 ns. One technically challenging option under consideration is the addition of fast Pulse Forming Lines in parallel to the existing Pulse Forming Networks for the 12 kicker magnets MKP-S, targeting a system field rise time of 100 ns. An alternative option is to optimise the system to approach the existing individual magnet field rise time (2-98%) of 150 ns. This would still significantly increase the number of colliding bunches in LHC while minimising the cost and effort of the system upgrade. The observed characteristics of the present system are described, compared to the expected system rise time, together with results of simulations and measurements with 175 and 150 ns injection batch spacing. The expected beam quality at injection into LHC is quantified, with the emittance growth and simulated tail population taking into account expected jitter and synchronisation errors, damper performance and SPS non-linear optics behavior. The outlook for deployment is discussed, with the implications for LHC operation and HL-LHC performance. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings injection JACoW ion JACoW kicker JACoW damping JACoW proton JACoW CERN CERN HL-LHC Carlier, Etienne CERN etienne.carlier@cern.ch JACoW-00001684 Ducimetière, Laurent CERN INSPIRE-00540386 JACoW-00001690 Kotzian, Gerd CERN gerd.kotzian@cern.ch JACoW-00034818 Uythoven, Jan CERN jan.uythoven@cern.ch JACoW-00001565 Velotti, Francesco EPFL-ISIC, Lausanne francesco.maria.velotti@cern.ch JACoW-00060243 ATS IPAC2016 TUPMR048 C16-05-08 2016 1237894 929159 http://cds.cern.ch/record/2207352/files/tupmr048.pdf Published version from JACoW 13 2111498 busan20160508 TUPMR048 ARTICLE ConferencePaper 0-0-0-0-0-0-1 2016-06-16 20:17:01 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207336 SzGeCERN 20220810144440.0 10.18429/JACoW-IPAC2016-MOPOY058 DOI JACoW oai:inspirehep.net:1469789 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469789 2016-08-11T09:22:22Z Inspire 1469789 eng CERN-ACC-2016-289 Shaposhnikova, Elena CERN INSPIRE-00186954 JACoW-00001642 Removing Known SPS Intensity Limitations for High Luminosity LHC Goals 2016 3 p In preparation of the SPS as an LHC injector its impedance was significantly reduced in 1999 - 2000. A new SPS impedance reduction campaign is planned now for the High Luminosity (HL)-LHC project, which requires bunch intensities twice as high as the nominal one. One of the known intensity limitations is a longitudinal multi-bunch instability with a threshold 3 times below this operational intensity. The instability is presently cured using the 4th harmonic RF system and controlled emittance blow-up, but reaching the HL-LHC parameters cannot be assured without improving the machine impedance. Recently the impedance sources responsible for this instability were identified and implementation of their shielding and damping is foreseen during the next long shutdown (2019 - 2020) in synergy with two other important upgrades: amorphous carbon coating of (part of) the vacuum chamber against the e-cloud effect and rearrangement of the 200 MHz RF system. In this paper the strategy of impedance reduction is presented together with beam intensity achievable after its realisation. The potential effect of other proposals on remaining limitations is also considered. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings impedance JACoW vacuum JACoW simulation JACoW emittance JACoW shielding JACoW CERN CERN HL-LHC Argyropoulos, Theodoros CERN INSPIRE-00229208 JACoW-00047351 Bohl, Thomas CERN t.bohl@cern.ch JACoW-00001552 Cruikshank, Paul CERN paul.cruikshank@cern.ch JACoW-00033339 Goddard, Brennan CERN INSPIRE-00545979 JACoW-00001570 Kaltenbacher, Thomas CERN thomas.kaltenbacher@cern.ch JACoW-00086371 Lasheen, Alexandre CERN alexandre.lasheen@cern.ch JACoW-00068852 Perez Espinos, Jaime CERN jaime.perez.espinos@cern.ch JACoW-00063332 Repond, Joël CERN joel.repond@cern.ch JACoW-00087989 Salvant, Benoit CERN benoit.salvant@cern.ch JACoW-00028406 Vollinger, Christine CERN christine.vollinger@cern.ch JACoW-00005502 ATS BE IPAC2016 MOPOY058 C16-05-08 2016 1237878 892616 http://cds.cern.ch/record/2207336/files/mopoy058.pdf Published version from JACoW 13 2111498 busan20160508 MOPOY058 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:05:16 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207333 SzGeCERN 20220810144747.0 10.18429/JACoW-IPAC2016-MOPOY006 DOI JACoW oai:inspirehep.net:1469749 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469749 2016-08-11T09:22:22Z Inspire 1469749 eng CERN-ACC-2016-292 Albright, Simon CERN simon.albright@cern.ch JACoW-00060694 Preparations for Upgrading the RF Systems of the PS Booster 2016 3 p The accelerators of the LHC injector chain need to be upgraded to provide the HL-LHC beams. The PS Booster, the first synchrotron in the LHC injection chain, uses three different RF systems (first, second and up to tenth harmonic) in each of its four rings. As part of the LHC Injector Upgrade the current ferrite RF systems will be replaced with broadband Finemet cavities, increasing the flexibility of the RF system. A Finemet test cavity has been installed in Ring 4 to investigate its effect on machine performance, especially beam stability, during extensive experimental studies. Due to large space charge impedance Landau damping is lost through most of the cycle in single harmonic operation, but is recovered when using the second harmonic and controlled longitudinal emittance blow-up. This paper compares beam parameters during acceleration with and without the Finemet test cavity. Comparisons were made using beam measurements and simulations with the BLonD code based on a full PS Booster impedance model. This work, together with simulations of future operation, have provided input for the decision to adopt a fully Finemet RF system. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings cavity JACoW impedance JACoW operation JACoW feedback JACoW emittance JACoW CERN CERN HL-LHC Quartullo, Danilo CERN danilo.quartullo@cern.ch JACoW-00076227 Shaposhnikova, Elena CERN INSPIRE-00186954 JACoW-00001642 ATS BE IPAC2016 MOPOY006 C16-05-08 2016 1237875 316583 http://cds.cern.ch/record/2207333/files/mopoy006.pdf Published version from JACoW 13 2111498 busan20160508 MOPOY006 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 20:01:14 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207323 SzGeCERN 20220810144745.0 10.18429/JACoW-IPAC2016-MOPOR011 DOI JACoW oai:inspirehep.net:1469681 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469681 2016-08-11T09:22:22Z Inspire 1469681 eng CERN-ACC-2016-302 Biancacci, Nicolo CERN nicolo.biancacci@cern.ch JACoW-00052044 Impedance Localization Measurements using AC Dipoles in the LHC 2016 4 p The knowledge of the LHC impedance is of primary importance to predict the machine performance and allow for the HL-LHC upgrade. The developed impedance model can be benchmarked with beam measurements in order to assess its validity and limit. This is routinely done, for example, moving the LHC collimator jaws and measuring the induced tune shift. In order to localize possible unknown impedance sources, the variation of phase advance with intensity between beam position monitors can be measured. In this work we will present the impedance localization measurements performed at injection in the LHC using AC dipoles as exciter as well as the underlying theory. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings impedance JACoW dipole JACoW quadrupole JACoW betatron JACoW optics JACoW CERN CERN HL-LHC Carver, Lee CERN lee.robert.carver@cern.ch JACoW-00057400 Papotti, Giulia CERN giulia.papotti@cern.ch JACoW-00035342 Persson, Tobias CERN tpersson@cern.ch JACoW-00051579 Salvant, Benoit CERN benoit.salvant@cern.ch JACoW-00028406 Tomás, Rogelio CERN INSPIRE-00286070 JACoW-00003672 ATS BE IPAC2016 MOPOR011 C16-05-08 2016 1237865 298154 http://cds.cern.ch/record/2207323/files/mopor011.pdf Published version from JACoW 13 2111498 busan20160508 MOPOR011 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 19:53:39 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2207321 SzGeCERN 20220810144744.0 DOI JACoW 10.18429/JACoW-IPAC2016-MOPOR009 oai:inspirehep.net:1469679 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d 2016-08-12T04:00:08Z marcxml oai:inspirehep.net:1469679 2016-08-11T09:22:22Z Inspire 1469679 eng CERN-ACC-2016-309 Biancacci, Nicolo JACoW-00052044 nicolo.biancacci@cern.ch CERN The HL-LHC Impedance Model and Aspects of Beam Stability 2016 4 p JACoW The LHC upgrade to the HLLHC foresees new challenging operational scenarios from the beam dynamics point of view. In order to ensure good machine operation and performance, the machine impedance, among other possible sources of instabilities like beam-beam and electron cloud, needs to be carefully quantified profiting also from the current LHC operation. In this work we present the HLLHC impedance model mainly focusing on the contribution of low-impedance collimators and crab cavities: the first reduces the broad-band impedance baseline thanks to the higher jaw material conductivity, the second increases the machine luminosity at the price of increasing the coupled bunch stabilizing octupole current threshold. Other elements like the injection protection absorber (TDI) will be also discussed. CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ publication The Author(s) 2016 publication SzGeCERN Accelerators and Storage Rings JACoW impedance JACoW HOM JACoW octupole JACoW cavity JACoW focusing CERN CERN HL-LHC Li, Kevin JACoW-00036104 kevin.shing.bruce.li@cern.ch CERN Métral, Elias INSPIRE-00331339 JACoW-00001671 CERN Salvant, Benoit JACoW-00028406 benoit.salvant@cern.ch CERN ATS BE MOPOR009 IPAC2016 C16-05-08 2016 1237863 219065 http://cds.cern.ch/record/2207321/files/mopor009.pdf Published version from JACoW 13 2111498 busan20160508 MOPOR009 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2016-06-16 19:53:12 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2159686 SzGeCERN 20220810145151.0 DOI 10.18429/JACoW-IPAC2016-WEOCA03 oai:cds.cern.ch:2159686 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN Inspire 1470113 CERN-ACC-2016-0079 eng Guillermo Cantón, Gerardo Merida, IPN Simulating Proton Synchrotron Radiation in the Arcs of the LHC, HL-LHC, and FCC-hh 2016 Geneva CERN 2016-05-08 At high proton-beam energies, beam-induced synchrotron radiation is an important source of heating, of beam-related vacuum pressure increase, and of primary photoelectrons, which can give rise to an electron cloud. We use the Synrad3D code developed at Cornell to simulate the photon distributions in the arcs of the LHC, HL-LHC, and FCC-hh. Specifically, for the LHC we study the effect of the “sawtooth” chamber, for the HL-LHC the consequences of the ATS optics with large beta beating in the arcs, and for the FCC-hh the effect of a novel beam-screen design, with a long slit surrounded by a “folded” antechamber. FP7 312453 EuCARD2 openAccess publication CC-BY-3.0 publication The Author(s) 2016 CERN Invenio WebSubmit GENEU 0.1 UNCL SzGeCERN Accelerators and Storage Rings EuCARD2 5: Extreme Beams (XBEAM) WP EuCARD2 5.2: Extreme colliders (XCOL) Task EuCARD2 EuCARD2CONF CERN CERN HL-LHC CERN LHC Sagan, David Cornell U. Zimmermann, Frank CERN ATS BE 2111498 busan20160508 1195648 247309 http://cds.cern.ch/record/2159686/files/CERN-ACC-2016-0079.pdf Published version from JACoW 1195648 1563904 http://cds.cern.ch/record/2159686/files/CERN-ACC-2016-0079.pdf?subformat=pdfa pdfa 1195648 2788 http://cds.cern.ch/record/2159686/files/CERN-ACC-2016-0079.gif?subformat=icon icon 1195648 3993 http://cds.cern.ch/record/2159686/files/CERN-ACC-2016-0079.jpg?subformat=icon- icon- julia.double@cern.ch 13 2111498 WEOCA03 busan20160508 PUBLIC ConferencePaper EuCARD2 ARTICLE 2156970 SzGeCERN 20220810143903.0 DOI 10.18429/JACoW-IPAC2016-WEPMW036 oai:cds.cern.ch:2156970 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN Inspire 1470245 CERN-ACC-2016-0064 eng Valloni, A. CERN U. Manchester (main) MERLIN Cleaning Studies with Advanced Collimator Materials for HL-LHC 2016 Geneva CERN 2016-05-19 The challenges of the High-Luminosity upgrade of the Large Hadron Collider require improving the beam collimation system. An intense R&D program has started at CERN to explore novel materials for new collimator jaws to improve robustness and reduce impedance. Particle tracking simulations of collimation efficiency are performed using the code MERLIN which has been extended to include new materials based on composites. After presenting two different implementations of composite materials tested in MERLIN, we present simulation studies with the aim of studying the effect of the advanced collimators on the LHC beam cleaning. FP7 312453 EuCARD2 openAccess publication CC-BY-3.0 publication The Author(s) 2016 CERN Invenio WebSubmit GENEU 0.1 UNCL SzGeCERN Accelerators and Storage Rings EuCARD2 11: Collimator Materials for fast High Density Energy Deposition (COMA-HDED) WP EuCARD2 11.2: Material testing for fast energy density deposition and high irradiation doses Task EuCARD2 EuCARD2CONF CERN ARTICLE CERN HL-LHC Rafique, H. U. Manchester (main) Huddersfield U. Mereghetti, A. CERN Molson, J. G. Orsay, LAL Appleby, R. U. Manchester (main) Bruce, R. CERN Quaranta, E. CERN Redaelli, S. CERN ATS 1193776 9115720 http://cds.cern.ch/record/2156970/files/CERN-ACC-2016-0064.pdf Published version from JACoW 1193776 1733064 http://cds.cern.ch/record/2156970/files/CERN-ACC-2016-0064.pdf?subformat=pdfa pdfa 1193776 2770 http://cds.cern.ch/record/2156970/files/CERN-ACC-2016-0064.gif?subformat=icon icon 1193776 4024 http://cds.cern.ch/record/2156970/files/CERN-ACC-2016-0064.jpg?subformat=icon- icon- julia.double@cern.ch 13 2111498 WEPMW036 busan20160508 PUBLIC ConferencePaper EuCARD2 ARTICLE 2156968 SzGeCERN 20220810143903.0 DOI 10.18429/JACoW-IPAC2016-WEPMW031 oai:cds.cern.ch:2156968 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN Inspire 1470241 CERN-ACC-2016-0062 eng Quaranta, E. CERN Towards Optimum Material Choices for HL-LHC Collimator Upgrade 2016 Geneva CERN 2016-05-19 The first years of operation at the LHC showed that collimator material-related concerns might limit the performance. In addition, the HL-LHC upgrade will bring the accelerator beyond the nominal performance through more intense and brighter proton beams. A new generation of collimators based on advanced materials is needed to match present and new requirements. After several years of R&D on collimator materials, studying the behaviour of novel composites with properties that address different limitations of the present collimation system, solutions have been found to fulfil various upgrade challenges. This paper describes the proposed staged approach to deploy new materials in the upgraded HL-LHC collimation system. Beam tests at the CERN HiRadMat facility were also performed to benchmark simulation methods and constitutive material models. FP7 312453 EuCARD2 openAccess publication CC-BY-3.0 publication The Author(s) 2016 CERN Invenio WebSubmit GENEU 0.1 UNCL SzGeCERN Accelerators and Storage Rings EuCARD2 11: Collimator Materials for fast High Density Energy Deposition (COMA-HDED) WP EuCARD2 11.3: Material mechanical modelling Task EuCARD2 EuCARD2CONF CERN CERN HL-LHC Bertarelli, A. CERN Biancacci, N. CERN Bruce, R. CERN Carra, F. Milan Polytechnic Métral, E. CERN Redaelli, S. CERN Rossi, A. CERN Salvant, B. CERN ATS 2111498 busan20160508 1193771 969361 http://cds.cern.ch/record/2156968/files/CERN-ACC-2016-0062.pdf Published version from JACoW 1193771 2675475 http://cds.cern.ch/record/2156968/files/CERN-ACC-2016-0062.pdf?subformat=pdfa pdfa 1193771 2760 http://cds.cern.ch/record/2156968/files/CERN-ACC-2016-0062.gif?subformat=icon icon 1193771 4003 http://cds.cern.ch/record/2156968/files/CERN-ACC-2016-0062.jpg?subformat=icon- icon- julia.double@cern.ch 13 2111498 WEPMW031 busan20160508 PUBLIC ConferencePaper EuCARD2 ARTICLE 2275958 SzGeCERN 20220817153213.0 DOI IOP 10.1088/1742-6596/874/1/012001 DOI 10.18429/JACoW-IPAC2017-MOPAB005 oai:inspirehep.net:1611144 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1611144 2017-07-26T14:43:18Z 2017-07-27T04:00:05Z marcxml Inspire 1611144 ARIES-2007-002 eng CERN-ACC-2017-333 Carra, F CERN Turin Polytechnic IOP The “Multimat” experiment at CERN HiRadMat facility: advanced testing of novel materials and instrumentation for HL-LHC collimators 2017 7 p IOP The increase of the stored beam energy in future particle accelerators, such as the HL-LHC and the FCC, calls for a radical upgrade in the design, materials and instrumentation of Beam Intercepting Devices (BID), such as collimators Following successful tests in 2015 that validated new composite materials and a novel jaw design conceived for the HL-LHC collimators, a new HiRadMat experiment, named “HRMT36-MultiMat”, is scheduled for autumn 2017. Its objective is to determine the behaviour under high intensity proton beams of a broad range of materials relevant for collimators and beam intercepting devices, thin-film coatings and advanced equipment. The test bench features 16 separate target stations, each hosting various specimens, allowing the exploration of complex phenomena such as dynamic strength, internal damping, nonlinearities due to anisotropic inelasticity and inhomogeneity, effects of energy deposition and radiation on coatings. This paper details the main technical solutions and engineering calculations for the design of the test bench and of the specimens, the candidate target materials and the instrumentation system. publication IOP cc-by http://creativecommons.org/licenses/by/3.0/ publication SzGeCERN Accelerators and Storage Rings CERN ARIES CERN HL-LHC CERN HL-LHC Bertarelli, A CERN Berthomé, E CERN Fichera, C CERN Furness, T Huddersfield U. Guinchard, M CERN Mettler, L K CERN Portelli, M CERN Malta U. Redaelli, S CERN Sacristan de Frutos, O CERN 012001 1 J. Phys.: Conf. Ser. 874 C17-05-14 2017 MOPAB005 IPAC2017 C17-05-14 2017 1362234 692108 http://cds.cern.ch/record/2275958/files/Fulltext.pdf 1362234 1732418 http://cds.cern.ch/record/2275958/files/Fulltext.pdf?subformat=pdfa pdfa 1362234 228052 http://cds.cern.ch/record/2275958/files/Fulltext.jpg?subformat=icon-700 icon-700 1362234 2311 http://cds.cern.ch/record/2275958/files/Fulltext.jpg?subformat=icon-180 icon-180 1362234 632 http://cds.cern.ch/record/2275958/files/Fulltext.gif?subformat=icon icon 13 2263434 MOPAB005 copenhagen20170514 ARTICLE ConferencePaper 2275961 SzGeCERN 20210209110546.0 DOI IOP 10.1088/1742-6596/874/1/012005 DOI 10.18429/JACoW-IPAC2017-TUPVA008 oai:inspirehep.net:1611147 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1611147 2017-07-26T14:43:19Z 2017-07-27T04:00:05Z marcxml Inspire 1611147 eng CERN-ACC-2017-331 Carra, F CERN IOP Assessment of thermal loads in the CERN SPS crab cavities cryomodule$^1$ 2017 7 p IOP As a part of the HL-LHC upgrade, a cryomodule is designed to host two crab cavities for a first test with protons in the SPS machine. The evaluation of the cryomodule heat loads is essential to dimension the cryogenic infrastructure of the system. The current design features two cryogenic circuits. The first circuit adopts superfluid helium at 2 K to maintain the cavities in the superconducting state. The second circuit, based on helium gas at a temperature between 50 K and 70 K, is connected to the thermal screen, also serving as heat intercept for all the interfaces between the cold mass and the external environment. An overview of the heat loads to both circuits, and the combined numerical and analytical estimations, is presented. The heat load of each element is detailed for the static and dynamic scenarios, with considerations on the design choices for the thermal optimization of the most critical components. IOP cc-by http://creativecommons.org/licenses/by/3.0/ publication SzGeCERN Accelerators and Storage Rings CERN CERN HL-LHC Apeland, J CERN Calaga, R CERN Capatina, O CERN Capelli, T CERN Verdú-Andrés, S RIKEN BNL Zanoni, C CERN 012005 1 J. Phys.: Conf. Ser. 874 C17-05-14 2017 TUPVA008 IPAC2017 C17-05-14 2017 1362214 975642 http://cds.cern.ch/record/2275961/files/Fulltext.pdf 1362214 1926109 http://cds.cern.ch/record/2275961/files/Fulltext.pdf?subformat=pdfa pdfa 1362214 195607 http://cds.cern.ch/record/2275961/files/Fulltext.jpg?subformat=icon-700 icon-700 1362214 3445 http://cds.cern.ch/record/2275961/files/Fulltext.gif?subformat=icon icon 1362214 4263 http://cds.cern.ch/record/2275961/files/Fulltext.jpg?subformat=icon-180 icon-180 13 TUPVA008 2263434 copenhagen20170514 ARTICLE ConferencePaper 2276047 SzGeCERN 20220817145935.0 DOI IOP 10.1088/1742-6596/874/1/012007 DOI 10.18429/JACoW-IPAC2017-TUPVA010 oai:inspirehep.net:1611149 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1611149 2017-07-27T08:40:47Z 2017-07-28T04:00:10Z marcxml Inspire 1611149 eng CERN-ACC-2017-323 Pellegrini, D CERN IOP Multiparametric response of the HL-LHC Dynamic Aperture in presence of beam-beam effects 2017 5 p IOP We performed extended simulations of HL-LHC dynamic aperture in the presence of beam-beam effects in the weak-strong approximation, evaluating the contributions of parameters such as: bunch intensity, crossing angle, chromaticity, current in the Landau octupoles and multipole errors. From the beam dynamics point of view, the main difference between the LHC (until 2017) and the HL-LHC is the deployment of the achromatic telescopic squeezing (ATS) optics, allowing not only for a smaller β* reach, but also modifying the phase advances between the lattice correctors (sextupoles, octupoles) and the main IPs, and increasing the peak β functions in the arcs. These correctors become therefore more efficient for the chromatic correction, but also a mitigation of the beam-beam long range interactions using the Landau octupoles is enabled, resulting in a possible reduction of the normalised crossing angle. The limits have been investigated in a tracking simulation campaign aimed at exploring the operational space for the HL-LHC and two possible options for luminosity levelling. IOP cc-by http://creativecommons.org/licenses/by/3.0/ publication SzGeCERN Accelerators and Storage Rings CERN CERN HL-LHC CERN HL-LHC Fartoukh, S CERN Karastathis, N CERN Papaphilippou, Y CERN 012007 1 J. Phys.: Conf. Ser. 874 C17-05-14 2017 TUPVA125 IPAC2017 C17-05-14 2017 1362188 322656 http://cds.cern.ch/record/2276047/files/Fulltext.pdf 1362188 1720212 http://cds.cern.ch/record/2276047/files/Fulltext.pdf?subformat=pdfa pdfa 1362188 2260 http://cds.cern.ch/record/2276047/files/Fulltext.jpg?subformat=icon-180 icon-180 1362188 241001 http://cds.cern.ch/record/2276047/files/Fulltext.jpg?subformat=icon-700 icon-700 1362188 603 http://cds.cern.ch/record/2276047/files/Fulltext.gif?subformat=icon icon 13 TUPVA125 2263434 copenhagen20170514 ARTICLE ConferencePaper 2276057 SzGeCERN 20210209110514.0 DOI IOP 10.1088/1742-6596/874/1/012092 DOI 10.18429/JACoW-IPAC2017-MOPVA096 oai:inspirehep.net:1611207 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1611207 2017-07-27T09:43:34Z 2017-07-28T04:00:10Z marcxml Inspire 1611207 eng CERN-ACC-2017-313 Zanoni, C CERN IOP The crab cavities cryomodule for SPS test 2017 7 p IOP RF Crab Cavities are an essential part of the HL-LHC upgrade. Two concepts of such systems are being developed: the Double Quarter Wave (DQW) and the RF Dipole (RFD). A cryomodule with two DQW cavities is in advanced fabrication stage for the tests with protons in the SPS. The cavities must be operated at 2 K, without excessive heat loads, in a low magnetic environment and in compliance with CERN safety guidelines on pressure and vacuum systems. A large set of components, such as a thermal shield, a two layers magnetic shield, RF lines, helium tank and tuner are required for the successful and safe operation of the cavities. The sum of all these components with the cavities and their couplers forms the cryomodule. An overview of the design and fabrication strategy of this cryomodule is presented. The main components are described along with the present status of cavity fabrication and processing and cryomodule assembly. The lesson learned from the prototypes and first manufactured systems are also included. IOP cc-by http://creativecommons.org/licenses/by/3.0/ publication SzGeCERN Accelerators and Storage Rings CERN CERN HL-LHC Amorim Carvalho, A CERN Artoos, K CERN Atieh, S CERN Brodzinski, K CERN Calaga, R CERN Capatina, O CERN Capelli, T CERN Carra, F CERN Dassa, L CERN Dijoud, T CERN Eiler, K CERN Favre, G CERN Freijedo Menendez, P CERN Garlaschè, M CERN Giordanino, L CERN Jones, T Daresbury Langeslag, S A E CERN Leuxe, R CERN Mainaud-Durand, H CERN Minginette, P CERN Narduzzi, M CERN Rude, V CERN Sosin, M CERN Swieszek, J S CERN Templeton, N Daresbury 012092 1 J. Phys.: Conf. Ser. 874 C17-05-14 2017 MOPVA096 IPAC2017 C17-05-14 2017 1362003 2464320 http://cds.cern.ch/record/2276057/files/Fulltext.pdf 1362003 19543 http://cds.cern.ch/record/2276057/files/Fulltext.gif?subformat=icon icon 1362003 20179 http://cds.cern.ch/record/2276057/files/Fulltext.jpg?subformat=icon-180 icon-180 1362003 210062 http://cds.cern.ch/record/2276057/files/Fulltext.jpg?subformat=icon-700 icon-700 1362003 3821785 http://cds.cern.ch/record/2276057/files/Fulltext.pdf?subformat=pdfa pdfa 13 MOPVA096 2263434 copenhagen20170514 ARTICLE ConferencePaper 2276061 SzGeCERN 20220817145935.0 DOI IOP 10.1088/1742-6596/874/1/012102 DOI 10.18429/JACoW-IPAC2017-WEPVA117 oai:inspirehep.net:1611213 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1611213 2017-07-27T09:43:34Z 2017-07-28T04:00:10Z marcxml Inspire 1611213 eng FERMILAB-CONF-17-275-AD-APC CERN-ACC-2017-309 Zanoni, Carlo CERN IOP Preliminary Mechanical Design Study of the Hollow Electron Lens for HL-LHC 2017 7 p IOP A Hollow Electron Lens (HEL) has been proposed in order to improve performance of halo control and collimation in the Large Hadron Collider in view of its High Luminosity upgrade (HL-LHC). The concept is based on a hollow beam of electrons that travels around the protons for a few meters. The electron beam is produced by a cathode and then guided by a strong magnetic field. The first step of the design is the definition of the magnetic field that drives the electron trajectories. The estimation of such trajectories by means of a dedicated MATLAB tool is presented. The influence of the main geometrical and electrical parameters is analyzed and discussed. Then, the main mechanical design choices for the solenoids, cryostats gun and collector are described. The aim of this paper is to provide an overview of the feasibility study of the Electron Lens for LHC. The methods used in this study also serve as examples for future mechanical and integration designs of similar devices. IOP cc-by http://creativecommons.org/licenses/by/3.0/ publication SzGeCERN Accelerators and Storage Rings CERN CERN HL-LHC CERN HL-LHC Gobbi, Giorgia CERN Perini, Diego CERN Stancari, Giulio Fermilab 012102 1 J. Phys.: Conf. Ser. 874 C17-05-14 2017 WEPVA117 IPAC2017 C17-05-14 2017 1361980 871493 http://cds.cern.ch/record/2276061/files/Fulltext.pdf 1361980 17808 http://cds.cern.ch/record/2276061/files/Fulltext.gif?subformat=icon icon 1361980 20911 http://cds.cern.ch/record/2276061/files/Fulltext.jpg?subformat=icon-180 icon-180 1361980 218752 http://cds.cern.ch/record/2276061/files/Fulltext.jpg?subformat=icon-700 icon-700 1361980 3086734 http://cds.cern.ch/record/2276061/files/Fulltext.pdf?subformat=pdfa pdfa 13 WEPVA117 2263434 copenhagen20170514 ARTICLE ConferencePaper 2281169 20171205101204.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA027 oai:cds.cern.ch:2281169 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN Inspire 1626433 CERN-ACC-2017-0065 FCC-DRAFT-ACC-2017-021 AUTHOR|(CDS)2068329 AUTHOR|(SzGeCERN)657481 Barranco Garcia, Javier javier.barranco@cern.ch Study of beam-beam long range compensation with octupoles 2017 Geneva CERN 19 May 2017 5 On behalf of EuroCirCol WP3 Long range beam-beam effects are responsible for particle losses and define fundamental operational parameters of colliders (i.e. crossing angles, intensities, emittances, ${\beta}$${^∗}$). In this study we propose octuple magnets as a possible scheme to efficiently compensate long-range beam-beam interactions with a global correction scheme. The impact and improvements on the dynamic aperture of colliding beams together with estimates of the luminosity potentials are dis- cussed for the HL-LHC upgrade and extrapolations made for the FCC project. H2020 654305 EuroCirCol CERN CDS-Invenio WebSubmit SzGeCERN Accelerators and Storage Rings SzGeCERN ACC FCC hadron collider FCC EuroCirCol CERN PUBLATS FCC ACC CERN FCC CERN HL-LHC AUTHOR|(CDS)2068647 AUTHOR|(SzGeCERN)610628 Pieloni, Tatiana Tatiana.Pieloni@cern.ch Ecole Polytechnique Federale de Lausanne (CH) AUTHOR|(CDS)2079236 AUTHOR|(SzGeCERN)699946 Buffat, Xavier Xavier.Buffat@cern.ch CERN AUTHOR|(CDS)2086978 AUTHOR|(SzGeCERN)740780 Tambasco, Claudia claudia.tambasco@cern.ch ConferencePaper TUPVA027 IPAC2017 C17-05-14 2017 1345186 2096846 http://cds.cern.ch/record/2281169/files/CERN-ACC-2017-0065.pdf FCC Note Stamped by WebSubmit: 29/08/2017 1360074 1947417 http://cds.cern.ch/record/2281169/files/Fulltext.pdf Fulltext 1360074 18761 http://cds.cern.ch/record/2281169/files/Fulltext.gif?subformat=icon icon Fulltext 1360074 19618 http://cds.cern.ch/record/2281169/files/Fulltext.jpg?subformat=icon-180 icon-180 Fulltext 1360074 210708 http://cds.cern.ch/record/2281169/files/Fulltext.jpg?subformat=icon-700 icon-700 Fulltext 1360074 2882409 http://cds.cern.ch/record/2281169/files/Fulltext.pdf?subformat=pdfa pdfa Fulltext 1345186 11283 http://cds.cern.ch/record/2281169/files/CERN-ACC-2017-0065.jpg?subformat=icon-180 icon-180 FCC Note Stamped by WebSubmit: 29/08/2017 1345186 3056821 http://cds.cern.ch/record/2281169/files/CERN-ACC-2017-0065.pdf?subformat=pdfa pdfa FCC Note Stamped by WebSubmit: 29/08/2017 1345186 6420 http://cds.cern.ch/record/2281169/files/CERN-ACC-2017-0065.gif?subformat=icon icon FCC Note Stamped by WebSubmit: 29/08/2017 1345186 73728 http://cds.cern.ch/record/2281169/files/CERN-ACC-2017-0065.jpg?subformat=icon-700 icon-700 FCC Note Stamped by WebSubmit: 29/08/2017 julie.hadre@cern.ch panagiotis.charitos@cern.ch celine.le.bon@cern.ch 29 Aug 2017 Approval Request as a Note n 201770 106 13 TUPVA027 2263434 copenhagen20170514 PUBLIC ConferencePaper ARTICLE 2287133 SzGeCERN 20180328092523.0 DOI bibmatch 10.18429/JACoW-IPAC2017-THPAB041 oai:inspirehep.net:1622679 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS OSTI 1390525 http://inspirehep.net/oai2d oai:inspirehep.net:1622679 2017-10-04T14:25:04Z 2017-10-05T04:00:08Z marcxml Inspire 1622679 eng FERMILAB-CONF-17-197-AD CERN-ACC-2017-307 Fitterer, M JACoW-00035817 ORCID:0000-0001-9276-6051 email:mfittere@fnal.gov Fermilab Implementation of Hollow Electron Lenses in SixTrack and First Simulation Results for the HL-LHC 2017 4 p JACoW Electron lenses have found a wide range of applications for hadron colliders, where the main applications are machine protection and beam-beam compensation. This paper summarizes the status of the current electron lens implementation in SixTrack with the focus on hollow electron beams for beam collimation and shows some first simulation results of the High-Luminosity upgrade of the LHC (HL-LHC). JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW electron JACoW simulation JACoW collimation JACoW octupole JACoW proton CERN CERN HL-LHC Stancari, G JACoW-00004210 ORCID:0000-0001-7432-5906 email:stancari@fnal.gov Fermilab Valishev, a INSPIRE-00472907 JACoW-00001212 email:valishev@fnal.gov Fermilab De Maria, R INSPIRE-00011670 JACoW-00019517 email:riccardo.de.maria@cern.ch CERN Redaelli, S INSPIRE-00373392 JACoW-00001564 email:stefano.redaelli@cern.ch CERN Sjobak, K JACoW-00055115 kyrre.ness.sjoebaek@cern.ch CERN Wagner, J F JACoW-00052238 joschka.wagner@cern.ch CERN Goethe U., Frankfurt (main) THPAB041 IPAC2017 C17-05-14 2017 http://lss.fnal.gov/archive/2017/conf/fermilab-conf-17-197-ad.pdf FERMILABCONF 1354512 1079070 http://cds.cern.ch/record/2287133/files/thpab041.pdf 1354513 1845817 http://cds.cern.ch/record/2287133/files/fermilab-conf-17-197-ad.pdf Fulltext 13 THPAB041 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-2-0-1-0-0-1 2017-09-11 23:17:05 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 SixTrack6DTrackingCode 1 http://sixtrack.web.cern.ch/SixTrack/ K.Sjobaketal presentedatIPAC’17,Copenhagen,Denmark,May,paperTHPAB047,thisconference 2 Newfeaturesofthe2017SixTrackrelease 2017 V.Previtalietal Batavia,USA,Rep PC 3 Fermilab FERMILAB-TM2560-A Numericalsimulationsofaproposed hollowelectronbeamcollimatorfortheLHCupgradeat CERN 2013 C.Zanonietal presentedatIPAC’17, Copenhagen,Denmark, May,paper WEPVA117,this conference 4 PreliminaryMechanicalDesignStudyof theHollowElectronLensforLHC 2017 V.Shiltsev 5 Springer ElectronLensesforSuper-Colliders 2016 F.Schmidt 6 SixTrack-User’sReferenceManual http://sixtrack.web.cern.ch/SixTrack/doc/manual_dev/six.pdf G.Stancari PC 7 FERMILAB-FN0972-A CalculationoftheTransverseKicksGenerated bytheBendsofaHollowElectronLens I.Morozovetal inProc.IPAC’12, NewOrleans,USA,May,paperMOEPPB008,pp.94- 96 8 SimulationofHollowElectronBeamCollimationintheFermilabTevatronCollider 2012 M.Fitterer etal presentedatIPAC’17, Copenhagen,Denmark, May,paper WEOBA2,this conference 9 HollowElectronBeamCollimationfor HL-LHC-EffectsontheBeamCore 2017 K.Sjobaketal inProc.IPAC’15,Richmond,VA,USA,May,paperMOPJE069,pp.468-471 10 Generalfunctionalityforturn-dependent elementpropertiesinSixTrack 2015 O.Brueningetal CERN, Geneva, Switzerland,October 11 ReportfromtheReviewPanelNeeds forahollowe-lensforthe HL-LHC 2016 D.Shatilov etal inProc. PAC’05,Knoxville,TN,USA,May,paperTPAT084, pp.4138-4140 12 Lifetraccodeforthe weak-strong simulationofthebeam-beameffectsinTevatron 2005 M.Fitterer etal Batavia,USA, Rep D,October 13 Fermilab FERMILAB-TM-2636-A SimulationstudyofHollowElectron BeamCollimationinHL-LHC 2016 1294962 G.Stancarietal FNAL,Batavia,IL,USA,Rep PC Oct 14 FERMILAB-TM-2572-A CERN-ACC-2014-0248 Conceptualdesignofhollowelectron lensesforbeamhalocontrolintheLargeHadronCollider 2014 2287134 SzGeCERN 20180328092520.0 DOI bibmatch 10.18429/JACoW-IPAC2017-WEOBA2 oai:inspirehep.net:1622968 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS OSTI 1390183 http://inspirehep.net/oai2d oai:inspirehep.net:1622968 2017-10-04T14:25:04Z 2017-10-05T04:00:08Z marcxml Inspire 1622968 eng FERMILAB-CONF-17-153-AD CERN-ACC-2017-306 Fitterer, M JACoW-00035817 ORCID:0000-0001-9276-6051 email:mfittere@fnal.gov Fermilab Hollow Electron Beam Collimation for HL-LHC - Effects on the Beam Core 2017 4 p Collimation with hollow electron beams is currently one of the most promising concepts for active halo control in the High Luminosity Large Hadron Collider (HL-LHC). To ensure the successful operation of the hollow beam collimator the unwanted effects on the beam core, which might arise from the operation with a pulsed electron beam, must be minimized. This paper gives a summary of the effect of hollow electron lenses on the beam core in terms of sources, provides estimates for HL-LHC and discusses the possible mitigation methods. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW electron JACoW emittance JACoW simulation JACoW experiment JACoW operation CERN CERN HL-LHC Stancari, G JACoW-00004210 ORCID:0000-0001-7432-5906 email:stancari@fnal.gov Fermilab Valishev, A INSPIRE-00472907 JACoW-00001212 email:valishev@fnal.gov Fermilab Bruce, R INSPIRE-00373385 JACoW-00011524 email:roderik.bruce@cern.ch CERN Papotti, G JACoW-00035342 giulia.papotti@cern.ch CERN Redaelli, S INSPIRE-00373392 JACoW-00001564 email:stefano.redaelli@cern.ch CERN Valentino, G CERN Malta U. Valentino, G CERN Valuch, D JACoW-00004360 daniel.valuch@cern.ch CERN Xu, C JACoW-00085512 chen.xu@cern.ch CERN WEOBA2 IPAC2017 C17-05-14 2017 http://lss.fnal.gov/archive/2017/conf/fermilab-conf-17-153-ad.pdf FERMILABCONF 1354514 239469 http://cds.cern.ch/record/2287134/files/weoba2.pdf 1354515 207933 http://cds.cern.ch/record/2287134/files/fermilab-conf-17-153-ad.pdf Fulltext 13 WEOBA2 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-0 2017-09-12 22:23:08 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 CERN, Geneva, Switzerland, October 1 Review on the needs for a hollow e-lens for the HL-LHC https://indico.cern.ch/event/567839/ 2016 G. Valentino Review of the needs for a hollow e-lens for the HL-LHC cern.ch/event/567839/timetable/#1006, October 2 What did we learn about halo population during MDs and regular operation? https://indico 2016 S. Redaelli et al. Proc. 6th International Particle Accelerator Conf. (IPAC15), Richmond, USA, May, paper WEBB1 3 Plans for Deployment of Hollow Electron Lenses at the LHC for Enhanced Beam Collimation 2015 J. Wagner et al. April 4 CERN-ACC-NOTE-2016-0062 Active halo control through narrow-band excitation with the ADT at injection 2016 H. Garcia-Morales et al. ColUSM82 610855/, February 5 Status of tune ripple MD analysis https://indico.cern.ch/event/ 2017 900377 G. Stancari, A. Valishev, G. Annala, G. Kuznetsov, V. Shiltsev, D. A. Still and L. G. Vorobiev in 6 Phys.Rev.Lett.,107,084802 Collimation with Hollow Electron Beams 2011 1294962 G. Stancari, V. Previtali, A. Valishev, R. Bruce, S. Redaelli, A. Rossi, B. S. Ferando PC 7 FERMILAB-TM-2572-A CERN-ACC-2014-0248 Conceptual design of hollow electron lenses for beam halo control in the Large Hadron Collider 2014 G. Stancari PC 8 FERMILAB-FN0972-A Calculation of the Transverse Kicks Generated by the Bends of a Hollow Electron Lens I. Morozov Proc. 5th International Particle Accelerator Conf. (IPAC12), New Orleans, USA, May, paper MOEPPB008 9 Simulation of Hollow Electron Beam Collimation in the Fermilab Tevatron Collider 2012 900377 G. Stancari et al. 10 Phys.Rev.Lett.,107,084802 Collimation with Hollow Electron Beams 2011 M. Fitterer et al. Joint LARP CM28/HiLumi Meeting 6/contribution/35, April 11 Hollow Electron Lens for HL-LHC: Effect on core https://conferences.lbl.gov/event/76/session/ 2017 A. Valishev Batavia, USA, Rep PC 12 Fermilab FERMILAB-TM-2584-A Simulation Study of Hollow Electron Beam Collimation for LHC 2014 V. Previtali, G. Stancari, A. Valishev Batavia, USA, Rep PC 13 Fermilab FERMILAB-TM-2560-A Numerical simulations of a proposed hollow electron beam collimator for the LHC upgrade at CERN 2013 M. Fitterer, G. Stancari, A. Valishev Batavia, USA, Rep D 14 Fermilab FERMILAB-TM-2636-A Simulation study of Hollow Electron Beam Collimation in HL-LHC 2016 M. Fitterer, G. Stancari, A. Valishev Batavia, USA, Rep D 15 Fermilab FERMILAB-TM-2635-A Effect of pulsed hollow e-lens operation on the beam core 2016 P. Baudrenghien, W. Höfle, F. Killing, I. Kojevnikov, G. Kotzian, R. Louwerse, E. Montesinos, V. Rossi, M. Schokker, E. Thepenier, D. Valuch, E.V. Gorbachev, N.I. Lebedev, A. A. Makarov, S.V. Rabtsun, V.M. Zhabitsky in Proc. 11th European Particle Accelerator Conf. (EPAC’08), Genoa, Italy, June, pp. 3266-3268, paper THPC121 16 LHC Transverse Feedback System and its Hardware Commissioning 2008 M. Fitterer et al. CERNACC-NOTE, to be published 17 Effect of a resonant excitation on the evolution of the beam emittance and halo population F. Antoniou private communication, Jul 18 2016 MADX 19 https://mad.web.cern.ch/mad/ SixTrack 20 http://sixtrack.web.cern.ch/SixTrack/ R. Tomás private communication, May 21 2016 822031 A. Valishev, Y. Alexahin, V. Lebedev and D. Shatilov 22 JINST,7,P12002 Simulation of beam-beam effects and Tevatron experience 2012 2287337 SzGeCERN 20180328092511.0 DOI JACoW 10.18429/JACoW-IPAC2017-MOPAB006 oai:inspirehep.net:1626188 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626188 2017-10-05T10:42:54Z 2017-10-06T04:00:04Z marcxml Inspire 1626188 eng CERN-ACC-2017-302 Nuiry, Francois-Xavier JACoW-00080409 francois-xavier.nuiry@cern.ch CERN JACoW Design and Prototyping of New CERN Collimators in the Framework of the LHC Injector Upgrade (LIU) Project and the High-Luminosity (HL-LHC) Project 2017 4 p JACoW In the framework of the Large Hadron Collider (LHC) Injectors Upgrade (LIU) and the High-Luminosity LHC (HL-LHC) Projects at CERN (European Organization for Nuclear Research, in Geneva, Switzerland), collimators in the Super Proton Synchrotron (SPS) to LHC transfer lines as well as ring collimators in the LHC will undergo important upgrades in the forthcoming years, mainly focused during the Long Shutdown 2 foreseen during 2019-2020. This contribution will detail the current design of the TCDIL collimators with a particular emphasis on the engineering developments performed on the collimator jaws, aiming at getting a stringent flatness while consid-ering also the integration of thermal shock resistant materials. The prototyping phase done at CERN will be also described. The activities ongoing to prepare the series production for other LHC collimator types (TCPPM, TCSPM, TCTPM, TCLD) will be presented, describing the role that each of these collimators play on the HL-LHC Project. A focus on the series production processes, the manufacturing and assembly technologies involved and the quality and performance assurance tests will be given. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW impedance JACoW collimation JACoW dipole JACoW proton JACoW vacuum CERN CERN HL-LHC Aberle, Oliver JACoW-00005400 oliver.aberle@cern.ch CERN Bergeret, Maxime JACoW-00085732 maxime.pierre.jean.bergeret@cern.ch CERN Bertarelli, Alessandro JACoW-00005409 alessandro.bertarelli@cern.ch CERN Biancacci, Nicolo JACoW-00052044 nicolo.biancacci@cern.ch CERN Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Calviani, Marco JACoW-00051963 ORCID:0000-0002-8213-8358 email:marco.calviani@cern.ch CERN Carra, Federico JACoW-00046645 federico.carra@cern.ch CERN Dallocchio, Alessandro JACoW-00012527 alessandro.dallocchio@cern.ch CERN Gentini, Luca JACoW-00045153 luca.gentini@cern.ch CERN Gilardoni, Simone JACoW-00007662 simone.gilardoni@cern.ch CERN Illan Fiastre, Ricardo JACoW-00099413 ricardo.illan.fiastre@cern.ch CERN Lamas Garcia, Inigo JACoW-00085721 inigo.lamas.garcia@cern.ch CERN Masi, Alessandro JACoW-00012636 alessandro.masi@cern.ch CERN Perillo-Marcone, Antonio JACoW-00059942 antonio.perillo-marcone@cern.ch CERN Pianese, Stefano JACoW-00099752 stefano.pianese@cern.ch CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN Rigutto, Emilien JACoW-00081890 emilien.rigutto@cern.ch CERN Salvant, Benoit JACoW-00028406 benoit.salvant@cern.ch CERN MOPAB006 IPAC2017 C17-05-14 2017 1357204 1027230 http://cds.cern.ch/record/2287337/files/mopab006.pdf 13 MOPAB006 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 22:26:35 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 697914 V. Kain Universitat Wien, Vienna, Austria 1 CERN-THESIS-2005-047 Machine Protection and Beam Quality during the LHC Injection Process M. A. Fraser EDMS document 1458583, ref. LHC-TCDI-ES-0004, September, CERN, Geneva, Switzerland, pp. 6-8 2 Functional and Conceptual Design of TCDI Transfer Line Collimators for LIU Upgrade 2015 L. Evans and P. Bryant Institute of physics publishing and SISSA, August, CERN, Geneva, Switzerland 3 LHC Machine 2008 F. L. Maciariello et al. in Proc. IPAC’16 4 High Intensity Beam Test of Low Z Materials for the Upgrade of SPS-to-LHC Transfer Line Collimators and LHC Injection Absorbers N. Mounet et al. presentation for the 3rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury Laboratory, England, November 5 Transverse Impedance in the HLLHC era 2013 F. Carra et al. presentation for the 3rd EuCARD Annual Meeting, April, University of Malta, Valletta, Malta 6 HRMT-23 Jaws Experiment at CERN HiRadMat Facility 2016 E. Quaranta et al. IPAC paper, April, CERN, Geneva, Switzerland 7 Towards Optimum Material Choices for HL-LHC Collimator Upgrade 2016 S. Redaelli and A. Rossi Engineering Change Request - Class I January, CERN, Geneva, Switzerland 8 Replacement of TCT in IR1, IR2, IR5 and of TCSG Collimators in IR6 with Collimators with Embedded BPM Buttons 2013 S. Redaelli and R. Bruce Engineering Change Request - Class I January, CERN, Geneva, Switzerland 9 Installation of a primary collimator with orbit pickups (TCPP) replacing a TCP 2013 N. Biancacci et al. presentation for LBOC meeting #63, April, CERN, Geneva, Switzerland 10 TCSG Impedance: Measurements vs Predictions 2016 S. Redaelli and R. Bruce Engineering Change Request - Class I January, CERN, Geneva, Switzerland 11 Installation of a lowimpedance secondary collimator (TCSPM) in IR7 2013 S. Redaelli et al. 978-3-95450-182-3 Status of Collimation Upgrade’s Conceptual Functional Specifications, presentation for the 8th HL-LHC Technical Committee, July 2014, CERN, Geneva, Switzerland. Proceedings of IPAC, Copenhagen, Denmark MOPAB006 01 Circular and Linear Colliders T19 Collimation 83 Copyright©CC-BY-3.0andbytherespectiveauthors 12 2017 2287338 SzGeCERN 20180328092508.0 DOI JACoW 10.18429/JACoW-IPAC2017-MOPAB011 oai:inspirehep.net:1626189 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626189 2017-10-05T10:42:54Z 2017-10-06T04:00:04Z marcxml Inspire 1626189 eng CERN-ACC-2017-301 Tsinganis, Andrea JACoW-00088691 andrea.tsinganis@cern.ch CERN JACoW Impact on the HL-LHC Triplet Region and Experiments From Asynchronous Beam Dumps on Tertiary Collimators 2017 4 p JACoW Accidental beam impacts on the tertiary collimators (TCTs) can lead to significant energy deposition in the triplet region and to leakage of the induced particle shower towards the experimental cavern. In this work, carried out in the context of the planned High Luminosity Upgrade of the LHC, severe impacts from asynchronous beam dumps on the horizontal tertiary collimators in cells 4 and 6 of the CMS insertion were studied, with half or a full proton bunch impacting on a collimator jaw. The choice of jaw material is shown to be of great importance, with over a factor of 10 increase in peak energy density values in the triplet coils moving from tungsten (Inermet) to molybdenum graphite jaws. Nevertheless, although the quench limit is exceeded in at least one or more triplet magnets in all the evaluated scenarios, values remain well below the damage limit. Energy spectra of particles leaking into the experimental cavern have also been estimated and are presented here. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW proton JACoW neutron JACoW photon JACoW optics JACoW interface CERN CERN HL-LHC Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN MOPAB011 IPAC2017 C17-05-14 2017 1357205 390071 http://cds.cern.ch/record/2287338/files/mopab011.pdf 13 MOPAB011 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2017-09-28 22:26:48 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 1507714 R. Bruce et al. 1 Nucl.Instrum.Meth.,A848,19-30 Reaching record-low �* at the CERN Large Hadron Collider using a novel scheme of collimator settings and optics 2017 Rep cds.cern.ch/record/1972604 2 CERN-ACC-2014-0300 HL-LHC Preliminary Design Report F. Schmidt Rep CERN, Geneva 3 CERN-SL-9456 SixTrack Version 4.2, User’s Reference Manual 2012 A. Mereghetti presented at the 8th Int. Particle Accelerator Conf. (IPAC’17), Copenhagen, Denmark , paper THPAB046, this conference 4 SixTrack for cleaning studies: 2017 updates 2017 R. De Maria 90th HiLumi WP2 Meeting, CERN, April 6,, indico.cern.ch/event/ 627307/ 10 7 108 10 9 10 10 10 11 1012 10 13 10 -4 10 -3 10 -2 10 -1 10 0 5 Status of v1.3 optics 2017 A. Ferrari et al. CERN, Geneva 6 FLUKA: A multi-particle transport code (program version 2005) 2005 1421238 G. Battistoni et al. 978-3-95450-182-3 MOPAB011 Proceedings of IPAC2017, Copenhagen, Denmark 98 Copyright©2017CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders T19 Collimation 7 Annals Nucl.Energy,82,10-18 Overview of the FLUKA code 2015 A. Mereghetti et al. in Proc. 3rd Int. Particle Accelerator Conf. (IPAC’12), New Orleans, LA, USA,, paper WEPPD071 8 The Fluka Linebuilder and Element Database: Tools for Building Complex Models of Accelerators Beam Lines 2012 E. Quaranta et al. in Proc. 7th Int. Particle Accelerator Conf. (IPAC’16), Busan, Korea,, paper WEPMW031 9 Towards Optimum Material Choices for the HL-LHC Collimator Upgrade 2016 P. Garcia-Ortega 206th LHC Collimation Working Group, CERN, June 27,, indico.cern.ch/ event/544856/ 10 Update on showers from TCTs to magnets during asynchronous dumps 2016 V. Vlachoudis in Proc. Int. Conf. on Mathematics, Computational Methods and Reactor Physics, American Nucl. Soc., Saratoga Springs, New York,, pp. 790-800 11 FLAIR: A powerful but user friendly graphical interface for FLUKA 2009 1262215 R. Bruce et al. 978-3-95450-182-3 Proceedings of IPAC2017, Copenhagen, Denmark MOPAB011 01 Circular and Linear Colliders T19 Collimation 99 Copyright©2017CC-BY-3.0andbytherespectiveauthors 12 Nucl.Instrum.Meth.,A729,825-840 Sources of machine-induced background in the ATLAS and CMS detectors at the CERN Large Hadron Collider 2013 2287339 SzGeCERN 20190716103835.0 DOI JACoW 10.18429/JACoW-IPAC2017-MOPAB012 oai:inspirehep.net:1626190 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626190 2017-10-05T10:42:54Z 2017-10-06T04:00:04Z marcxml Inspire 1626190 eng CERN-ACC-2017-300 Skordis, Eleftherios JACoW-00060489 eleftherios.skordis@cern.ch U. Liverpool (main) CERN CERN, Geneva, Switzerland JACoW Study of the 2015 Top Energy LHC Collimation Quench Tests Through an Advanced Simulation Chain 2017 4 p JACoW While the LHC has shown record-breaking perfor-mance during the 2016 run, our understanding of the behaviour of the machine must also reach new levels. The collimation system and especially the betatron cleaning insertion region (IR7), where most of the beam halo is intercepted to protect superconducting (SC) magnets from quenching, has so far met the expectations but could nonetheless pose a bottleneck for future operation at higher beam intensities for HL-LHC. A better under-standing of the collimation leakage to SC magnets is required in order to quantify potential limitations in terms of cleaning efficiency, ultimately optimising the collider capabilities. Particle tracking simulations com-bined with shower simulations represent a powerful tool for quantifying the power deposition in magnets next to the cleaning insertion. In this study, we benchmark the simulation models against beam loss monitor measure-ments from magnet quench tests (QT) with 6.5 TeV pro-ton and 6.37Z TeV Pb ion beams. In addition, we investi-gate the effect of possible imperfections on the collima-tion leakage and the power deposition in magnets. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW ion JACoW simulation JACoW proton JACoW collimation JACoW heavy-ion CERN CERN HL-LHC CERN LHC Bruce, Roderik INSPIRE-00373385 JACoW-00011524 CERN Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN Ferrari, Alfredo JACoW-00005411 alfredo.ferrari@cern.ch CERN Hermes, Pascal JACoW-00074053 CERN Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN Mereghetti, Alessio JACoW-00036877 alessio.mereghetti@cern.ch CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN Salvachua, Belen INSPIRE-00222882 JACoW-00057859 CERN Vlachoudis, Vasilis JACoW-00005407 vasilis.vlachoudis@cern.ch CERN Welsch, Carsten JACoW-00000587 c.p.welsch@liverpool.ac.uk U. Liverpool (main) Cockcroft Inst. Accel. Sci. Tech. Cockcroft Institute, Warrington, Cheshire, United Kingdom MOPAB012 IPAC2017 C17-05-14 2017 1357206 563224 http://cds.cern.ch/record/2287339/files/mopab012.pdf 13 MOPAB012 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 22:27:08 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 LHC design report v.1 1 CERN-2004-003 J. M. Jowett et al. in Proc. IPAC’16, Busan, Korea, May, pp. 1493-1496 2 The 2015 Heavy-ion run of the LHC 2016 1418897 G. Apollinari et al. 3 CERN-2015-005 High Luminosity Large Hadron Collider (HL-LHC): Preliminary Design Report 2015 The HiLumi LHC Collaboration 28 Novermber 4 CERN-ACC-2014-105 HL-LHC Preliminary Design Report, Chapter 5: Collimation system 2014 R.W. Assmann in Proc. of the LHC Project Workshop - Chamonix XIV, Chamonix, France, 261 5 Collimators and Beam Absorbers for Cleaning and Machine Protection 2005 R.W. Assmann et al. in Proc. of the European Particle Accelerator Conference, Edinburgh, Scotland, 986 6 The Final Collimation System for the LHC 2006 B. Salvachua et al. 7 CERN-ACC-NOTE-2014-0036 Collimation quench test with 4 TeV proton beams 2014 B. Salvachua et al. IPAC’14, Dresden, Germany,, pp 174-177 8 Handling 1 MW Losses with the LHC Collimation System 2014 F. Schmidt CERN, Geneva, Switzerland, Rep 9 CERN-SL-9456 SixTrackVersion 4.2.16 Single Particle Tracking Code Treating Transverse Motion with Synchrotron Oscillations in a Symplectic Manner 2012 394965 G. Ripken and F. Schmidt CERN, Geneva, Switzerland, Rep (AP) 10 CERN-SL-95-12 A symplectic sixdimensional thin-lens formalism for tracking 1995 1421238 G. Battistoni et al. 11 Annals Nucl.Energy,82,10-18 Overview of the FLUKA code 2015 701721 A. Ferrary, P. R. Sala, A. Fassò, and J. Ranft Rep INFN/TC 05/11 Oct 12 CERN-2005-10 SLAC-R-773 FLUKA: a multi-particle transport code 2005 V. Vlachoudis in Proc. International Conference on Mathematics, Computational Methods & Reactor Physics, La Grange Park, IL: American Nuclear Society, p. 1-11 13 FLAIR: a powerful but user friendly graphical interface for FLUKA 2009 B. Salvachua et al. CERN-ACCNOTE--0015 14 Collimation quench test with 6.5 TeV proton beams 2016 P. D. Hermes et al. MD 15 CERN-ACC-NOTE-2016-0031 LHC Heavy-Ion Collimation Quench Test at 6.37Z TeV 2016 A. Mereghetti et al. IPAC’13, Shanghai, China, pp 2657-2659 16 Sixtrack-Fluka Active Coupling for the Upgrade of the SPS Scrapers A. Mereghetti et al. presented at IPAC’17, Copenhagen, Denmark, May, paper THPAB046, this conference 17 SixTrack for Cleaning Studies: 2017 Updates 2017 P. D. Hermes et al. IPAC’16, Busan, Korea, pp 2490-2493 18 Simulation Of Heavy-Ion Beam Losses With The Sixtrack-Fluka Active Coupling P. D. Hermes PhD thesis, University of Munster 19 Heavy-Ion Collimation at the Large Hadron Collider: Simulations and Measurements 2016 A. Mereghetti et al. IPAC’12, New Orleans, Louisiana, USA, pp 2687-2689 20 The FLUKA LineBuilder and Element Database: Tools for Building Complex Models of Accelerator Beam Lines E. Skordis et al. IPAC’15, Richmond, USA, pp 2116-2119 21 Impact Of Beam Losses In The LHC Collimation Regions 1315859 R. Bruce et al. 22 Phys.Rev.ST Accel.Beams,17,081004 Simulations and measurements of beam loss patterns at the CERN Large Hadron Collider 2014 C. Braco 978-3-95450-182-3 PhD thesis, EPFL, Lausanne, Switzerland, 2009. Proceedings of IPAC, Copenhagen, Denmark MOPAB012 01 Circular and Linear Colliders T19 Collimation 103 Copyright©CC-BY-3.0andbytherespectiveauthors 23 Commissioning Scenarios and Tests for the LHC Collimation System 2017 2289468 SzGeCERN 20180206140823.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPVA097 oai:inspirehep.net:1626401 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626401 2017-10-16T13:51:53Z 2017-10-17T04:00:09Z marcxml Inspire 1626401 eng CERN-ACC-2017-217 Barnes, Michael INSPIRE-00064621 JACoW-00000086 CERN JACoW Upgrading the SPS Fast Extraction Kicker Systems for HL-LHC 2017 4 p JACoW The CERN SPS has two fast extraction systems, each consisting of travelling wave kicker magnets (MKEs). The beam induced heating in the ferrite yoke of these magnets was historically kept to an acceptable level by implementing water cooling of the kicker magnets: in addition serigraphy was applied on the surfaces of the ferrite yoke facing the beam. Nevertheless, high intensity beams needed in the future for HL-LHC will significantly increase the beam induced heating, potentially raising the MKE ferrite yoke temperature to its Curie point. Hence detailed studies of longitudinal beam coupling impedance were carried out to identify simple but effective methods of further reducing beam induced power deposition. Based on the results of these studies, and in the framework of the LHC Injectors Upgrade (LIU) project, an upgraded MKE kicker magnet was installed during the 2015-2016 shutdown. This paper reports and compares results of predictions, laboratory measurements, temperature measurements during SPS operation, and machine development studies. Measurements of both dynamic pressure rise in the upgraded magnet and Secondary Electron Yield, on samples, are also reported. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW kicker JACoW impedance JACoW electron JACoW extraction JACoW resonance CERN CERN HL-LHC Beck, Mario JACoW-00086223 mario.beck@cern.ch CERN Day, Hugo JACoW-00046625 CERN Ducimetière, Laurent INSPIRE-00540386 JACoW-00001690 CERN Garcia-Tabares Valdivieso, Elisa JACoW-00099870 lisa.garcia-tabares.valdivieso@cern.c CERN Goddard, Brennan INSPIRE-00545979 JACoW-00001570 ORCID:0000-0002-9902-2431 CERN Neupert, Holger JACoW-00005517 holger.neupert@cern.ch CERN Romano, Annalisa JACoW-00068795 annalisa.romano@cern.ch CERN Vega Cid, Lorena JACoW-00085967 lorena.vega@cern.ch CERN Weterings, Wim JACoW-00004260 wim.weterings@cern.ch CERN Zannini, Carlo INSPIRE-00372980 JACoW-00039097 ADAM, Geneva WEPVA097 IPAC2017 C17-05-14 2017 1360261 1433006 http://cds.cern.ch/record/2289468/files/wepva097.pdf 13 WEPVA097 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:39:09 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 441609 P. Collier et al. (DI) 1 CERN-SL-97-07 The SPS as Injector for LHC, Conceptual Design 1997 J. Uythoven, G. Arduini, T. Bohl, F. Caspers, E.H. Gaxiola, T. Kroyer, M. Timmins, L. Vos in Proc. EPAC, Lucerne, Switzerland, July, MOPLT035, pp623-625 2 Beam Induced Heating of the SPS Fast Pulsed Magnets http://www.JACoW.org 2004 M. Timmins, A. Bertarelli, J. Uythoven, E. Gaxiola BT (Rev.2) 3 AB-NOTE-2004005 SPS Extraction Kicker Magnet Cooling Design A. Adraktas, M.J. Barnes, L. Ducimetière presented at IPAC’17, Copenhagen, Denmark, Maypaper WEPVA099, this conference 4 Influence of Conducting Serigraphy upon Field Pulse Shape of the SPS Extraction Kicker Systems 2017 T. Kroyer F. Caspers, E. Gaxiola CERN 5 AB-NOTE-2007-028 Longitudinal and Transverse Wire Measurements for the Evaluation of Impedance Reduction Measures on the MKE Extraction Kickers 2007 J. Coupard et al. in Proc. of IPAC, Busan, Korea, May, MOPOY059, pp992-995 6 LHC injectors upgrade (LIU) project at CERN http://www.JACoW.org 2016 M.J. Barnes, F. Caspers, K. Cornelis, L. Ducimetière, E. Mahner, G. Papotti, G. Rumolo, V. Senaj, E. Shaposhnikova in Proc. PAC, Vancouver, Canada, May, FR2RAC02, pp4264-4266 7 Measurement and Analysis of SPS Kicker Magnet Heating and Outgassing with Different Bunch Spacing http://www.JACoW.org 2009 1296518 C. Zannini PhD Thesis, Lausanne, EPFL 8 CERN-THESIS-2013-076 Electromagnetic simulations of CERN accelerator components and experimental applications 2013 M.J. Barnes, A. Adraktas, G. Bregliozzi, B. Goddard, L. Ducimetière, B. Salvant, J. Sestak, L. Vega Cid, W. Weterings, C. Yin Vallgren 978-3-95450-182-3 presented at IPAC’17, Copenhagen, Denmark, Maypaper WEPVA100, this conference. WEPVA097 Proceedings of IPAC, Copenhagen, Denmark 3486 Copyright©CC-BY-3.0andbytherespectiveauthors 07 Accelerator Technology T16 Pulsed Power Technology 9 Operational experience of the upgraded LHC injection kicker magnets during Run 2 and future plans 2017 2289470 SzGeCERN 20220125165734.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPVA116 oai:inspirehep.net:1626403 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626403 2017-10-16T13:51:53Z 2017-10-17T04:00:09Z marcxml Inspire 1626403 eng CERN-ACC-2017-215 Yammine, Samer JACoW-00094603 samer.yammine@cern.ch CERN JACoW HL-LHC Inner Triplet Powering and Control Strategy 2017 3 p JACoW In order to achieve the target 3000 fb-1 integrated field for the HL-LHC (High Luminosity ' Large Hadron Collider) at ATLAS and CMS, new large aperture quadrupoles are required for the final focusing triplet magnets before the interaction points. These low-' magnets, based on the Nb$_{3}$Sn technology, deliver a peak field of 11.4 T. They consist of two outer quadrupoles, Q1 and Q3 and a central one divided into two identical magnets, Q2a and Q2b. To optimize the powering and the beam dynamics of these triplets, the quadrupoles will be powered in series by a single high-current two quadrants (2-Q) converter [18 kA, ±10 V]. Three 4-Q trim power converters are added over Q1 [±2 kA, ±10 V], Q2a [±0.12 kA, ±10 V] and Q3 [±2 kA, ±10 V] to account for possible transfer function difference between the quadrupoles. This paper presents the powering scheme of the four mentioned coupled circuits. A digital control strategy, using four standard LHC digital controllers, to decouple the four systems and to achieve a high precision control is proposed and discussed. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW controls JACoW quadrupole JACoW simulation JACoW luminosity JACoW hadron CERN CERN LHC CERN HL-LHC Thiesen, Hugues JACoW-00004698 hugues.thiesen@cern.ch CERN WEPVA116 IPAC2017 C17-05-14 2017 1360263 649645 http://cds.cern.ch/record/2289470/files/wepva116.pdf 13 2263434 WEPVA116 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:39:23 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 2289473 SzGeCERN 20180206140811.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPIK066 oai:inspirehep.net:1626422 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626422 2017-10-16T12:45:49Z 2017-10-17T04:00:09Z marcxml Inspire 1626422 eng CERN-ACC-2017-212 Wanzenberg, Rainer INSPIRE-00134931 JACoW-00000408 DESY JACoW Calculation of Wakefields and Higher Order Modes for the Vacuum Chamber of the CMS, ATLAS, ALICE and LHCb Experiments for the HL-LHC 2017 3 p JACoW The High Luminosity Large Hadron Collider (HL-LHC) project was started with the goal to extend the discovery potential of the Large Hadron Collider (LHC). The HL-LHC study implies also upgraded dimensions of the experimental beam pipes of the CMS, ATLAS, ALICE and LHCb experiments. The trapped monopole and dipole Higher Order Modes (HOMs) and the short range wakefields for the new design of the vacuum chambers were calculated with help of the computer codes MAFIA and ECHO2D. The results of the short range wakefields calculations and the HOMs calculations are presented in this report. The short range wakefields are presented in terms of longitudinal and transverse wake potentials and also in terms of loss and kick parameters. Selected results from the HOMs calculations , including the the frequency, the loss parameter, the R/Q and the Q value are presented. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW wakefield JACoW vacuum JACoW higher-order-mode JACoW dipole JACoW impedance CERN CERN HL-LHC Metral, Elias INSPIRE-00331339 JACoW-00001671 CERN Salvant, Benoit JACoW-00028406 benoit.salvant@cern.ch CERN Zagorodnova, Olga JACoW-00039455 DESY WEPIK066 IPAC2017 C17-05-14 2017 1360266 867787 http://cds.cern.ch/record/2289473/files/wepik066.pdf 13 WEPIK066 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-1-0-1-0-0-1 2017-09-28 23:37:59 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 O. Brüning, H. Burkhardt, S. Myers Progress in Particle and Nuclear Physics, vol. 67, Iss. 3, p. 705-734, July 1 The Large Hadron Collider 2012 1237132 R. Wanzenberg, O. Zagorodnova TECH, CERN, April 2 CERN-ATS-NOTE-2013-018 Calculation of Wakefields and Higher Order Modes for the New Design of the Vacuum Chamber of the CMS Experiment for the HL-LHC 2013 R. Wanzenberg, O. Zagorodnova TECH, CERN, Nov 3 CERN-ACC-NOTE-2013-0046 Calculation of Wakefields and Higher Order Modes for the Vacuum Chamber of the ATLAS Experiment for the HL-LHC 2013 R. Wanzenberg, O. Zagorodnova CERNACC-NOTE--0033 4 CERN-2017 Calculation of Wakefields and Higher Order Modes for the New Design of the Vacuum Chamber of the ALICE Experiment for the HL-LHC 2017 R. Wanzenberg, O. Zagorodnova CERNACC-NOTE--0034 5 CERN-2017 Calculation of Wakefields for the New Design of the LHCb Vertex Locator 2017 687693 I. Zagorodnov and T. Weiland 6 Phys.Rev.ST Accel.Beams,8,042001 TE/TM field solver for particle beam simulations without numerical Cherenkov radiation 2005 718847 I. Zagorodnov 7 Phys.Rev.ST Accel.Beams,9,102002 Indirect methods for wake potential integration 2006 CST AG, Bad Nauheimer Str. 19, 64289 Darmstadt, Germany 8 CST Studio Suite T. Weiland, R. Wanzenberg in Joint US-CERN part. acc. school, Hilton Head Island, SC, USA, 7 - 14 Nov 1990, M Dienes, M Month and S Turner (eds.) - Berlin,- (Lecture notes in physics 9 Springer Wakefields and Impedances 1992 400) - pp.39-79 9 W.K.H. Panofsky, W.A. Wenzel p. 967 10 Rev.Sci.Instrum.,27,11 Some consideration concerning the transverse deflection of charged particles in radiofrequency fields 1956 736364 T. F. Günzel 11 Phys.Rev.ST Accel.Beams,9,114402 Transverse Coupling Impedance Of The Storage Ring At The European Synchrotron Radiation Facility 2006 199695 T. Weiland 12 Part.Accel.,15,245-292 On the numerical solution of Maxwell’s Equations and Applications in the Field of Accelerator Physics 1984 CST AG, Bad Nauheimer Str. 19, 64289 Darmstadt, Germany 13 MAFIA Release 4 (V4.200) 200483 T. Weiland 14 Nucl.Instrum.Meth.,216,329-348 On the computation of resonant modes in cylindrically symmetric cavities 1983 D.R. Lide, Ed. Handbook of Chemistry and Physics, 79th edition,-1999, CRC Press, Washington, D.C 15 1998 R. Wanzenberg 978-3-95450-182-3 CERN, May 2009. Proceedings of IPAC, Copenhagen, Denmark WEPIK066 05 Beam Dynamics and Electromagnetic Fields D04 Beam Coupling Impedance - Theory, Simulations, Measurements, Code Developments 3083 Copyright©CC-BY-3.0andbytherespectiveauthors 16 LHC-Project-Note-418 Calculation of Higher Order Modes and Wakefields for the Vacuum Chamber of the CMS Experiment at the LHC 2017 2289476 SzGeCERN 20180206140803.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA011 oai:inspirehep.net:1626426 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626426 2017-10-16T12:45:49Z 2017-10-17T04:00:09Z marcxml Inspire 1626426 eng CERN-ACC-2017-209 Guillermo Cantón, Gerardo JACoW-00085429 gerardo.guillermo.canton@cern.ch CERN JACoW Comparing Behaviour of Simulated Proton Synchrotron Radiation in the Arcs of the LHC with Measurements 2017 4 p JACoW In previous work it was shown that at high proton-beam energies, synchrotron radiation is an important source of beam-screen heating, of beam-related vacuum pressure increase, and of primary photoelectrons, which can contribute to electron cloud formation. We have used the Synrad3D code developed at Cornell to simulate the photon distributions in the arcs of the LHC, HL-LHC, and FCC-hh. Specifically, for the LHC we studied the effect of the sawtooth chamber. In this paper specific results of the Synrad3D simulations are compared with simulations in Synrad+, developed at CERN; and later on compared with experimental data for actual LHC vacuum-chamber samples. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW photon JACoW simulation JACoW synchrotron JACoW synchrotron-radiation JACoW radiation CERN CERN HL-LHC Ady, Marton JACoW-00068087 marton.ady@cern.ch CERN Angelucci, Marco JACoW-00100454 marco.angelucci@lnf.infn.it Frascati Cimino, Roberto INSPIRE-00472895 JACoW-00012372 ORCID:0000-0002-7584-1950 Frascati Kersevan, Roberto JACoW-00057096 roberto.kersevan@cern.ch CERN La Francesca, Eliana JACoW-00095272 eliana.lafrancesca@lnf.infn.it Frascati Sagan, David INSPIRE-00122342 JACoW-00002019 Cornell U., CLASSE Zimmermann, Frank INSPIRE-00138581 JACoW-00001653 CERN TUPVA011 IPAC2017 C17-05-14 2017 1360269 424442 http://cds.cern.ch/record/2289476/files/tupva011.pdf 13 TUPVA011 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2017-09-28 22:30:39 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 G. Guillermo Cantón, D. Sagan and F. Zimmermann in Proc. of Int. Particle Accelerator Conf., pp.-2076, JACoW, June 2016 1 Simulating Proton Synchrotron Radiation in the Arcs of the LHC, HL-LHC and FCC-hh 2073 1515300 G. Dugan and D. Sagan 2 Phys.Rev.Accel.Beams,20,020708 Simulating synchrotron radiation in accelerators including diffuse and specular reflections 2017 R. Cimino et al. in App. Surf. Sci., p. 231 vol. 235, Jul 3 Vacuum chamber surface electronic properties influencing electron cloud phenomena 2004 N. Mahne et al. in App 4 Surf.Sci.,235,221 Photon reflectivity distributions from the LHC beam screen and their implications on the arc beam vacuum system 2004 G. F. Dugan et al. in Phys. Rev. ST Accel. Beam, vol. 18, p. 040704, Jul 5 Measurements of x-ray scattering from accelerator vacuum chamber surfaces, and comparison with an analytical mode 2015 R. Cimino et al. in Int. J of Modern Physics A, vol. 29, p. 1430023, Jul 6 Electron cloud in accelerator 2014 F. Schäfers and R. Cimino in Proc. ECLOUD’12, vol. 29, p. 105, Jul 7 Soft x-ray reflectivity: from quasi-perfect mirrors to accelerator walls 2013 A. A. Sokolov, F. Eggenstein, A. Erko, R. Follath, S. Künstner, M. Mast, J. S. Schmidt, F. Senf, F. Siewert, T. Zeschke, and F. Schäfers in Sept 8 Proc.SPIE Int.Soc.Opt.Eng.,9206,92060 An XUV optics beamline at BESSY II 2014 R. Kersevan in Proc.Particle Accelerators Conf., pp. 3848-3850 vol. 5, May 9 Synrad, a Monte Carlo synchrotron radiation ray-tracing program 1993 F. Eggenstein, P. Bischoff, A. Gaupp, F. Senf, A. Sokolov, T. Zeschke, and F. Schäfers in Proc. SPIE L. Assoufid, H. Ohashi, and A. K. Asundi (eds.) vol. 9206, p. 920607, Sept 10 A reflectometer for atwavelength characterization of XUV-reflection gratings 2014 429704 O. Gröbner 978-3-95450-182-3 in TUPVA011 Proceedings of IPAC2017, Copenhagen, Denmark 2062 Copyright©2017CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 11 Vacuum,47,591-595 Technological problems related to the cold vacuum system of the LHC 1996 2289480 SzGeCERN 20180206140754.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA021 oai:inspirehep.net:1626430 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626430 2017-10-16T11:43:15Z 2017-10-17T04:00:09Z marcxml Inspire 1626430 eng CERN-ACC-2017-205 Tsinganis, Andrea JACoW-00088691 andrea.tsinganis@cern.ch CERN JACoW Impact of Collision Debris in the HL-LHC ATLAS and CMS Insertions 2017 4 p JACoW The High Luminosity upgrade of the LHC (HL-LHC) foresees the baseline operation of the accelerator at a 5 times higher peak luminosity (5.0x1034cm⁻²s^{−1}). The impact of collision debris on the magnets and other equipment in the triplet region and matching section of the ATLAS and CMS insertions has been evaluated by means of detailed FLUKA models implementing the latest optics and layout version. Qualitative and quantitative differences between the vertical and horizontal beam crossing schemes are highlighted. With measures in place to mitigate the effects of the interruption of the beam screen in the triplet interconnections and the Q4 aperture reduction, peak dose values in the superconducting coils remain below 30MGy in the triplet-D1 and below 12MGy in the matching section magnets for an integrated luminosity of 3000fb-1. Peak power density values are lower than 3mW/cm³ and 1mW/cm³ in the triplet and matching section respectively. Total heat loads in magnets, collimators, masks and absorbers were also estimated, along with dose and particle fluence maps relevant for Radiation to Electronics (R2E) aspects. The effect of a displacement of the interaction point is also addressed. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW proton JACoW optics JACoW insertion JACoW radiation CERN CERN HL-LHC Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN TUPVA021 IPAC2017 C17-05-14 2017 1360273 259326 http://cds.cern.ch/record/2289480/files/tupva021.pdf 13 TUPVA021 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2017-09-28 22:31:15 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 CERN, Geneva, Switzerland, Rep cds.cern. ch/record/1972604 1 CERN-ACC-2014-0300 HL-LHC Preliminary Design Report 2014 701721 A. Ferrari, P.R. Sala, A.Fassò, and J. Ranft CERN, Geneva, Switzerland, Rep Oct 2 CERN-2005-010 FLUKA: A multiparticle transport code (program version 2005) 2005 1421238 G. Battistoni et al. 3 Annals Nucl.Energy,82,10-18 Overview of the FLUKA code 2015 A. Mereghetti et al. in Proc. 3rd Int. Particle Accelerator Conf. (IPAC’12), New Orleans, LA, USA, May, paper WEPPD071, pp. 2687-2689 4 The FLUKA linebuilder and element database: tools for building complex models of accelerator beam lines 2012 L.S. Esposito, F. Cerutti, and E. Todesco in Proc. 4th Int. Particle Accelerator Conf. (IPAC’13), Shanghai, China, May, TUPFI021, pp. 1379-1381 5 FLUKA energy deposition studies for the HL-LHC 2013 1357641 N.V. Mokhov et al. 978-3-95450-182-3 TUPVA021 Proceedings of IPAC2017, Copenhagen, Denmark 2096 Copyright©2017CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 6 Phys.Rev.ST Accel.Beams,18,051001 Energy deposition studies for the highluminosity Large Hadron Collider inner triplet magnets 2015 2289636 SzGeCERN 20180205163749.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPVA114 oai:inspirehep.net:1626252 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626252 2017-10-17T21:21:58Z 2017-10-18T04:00:43Z marcxml Inspire 1626252 eng CERN-ACC-2017-193 Sanchez Galan, Francisco JACoW-00094679 francisco.sanchez.galan@cern.ch CERN JACoW Optimising Machine-Experiment Interventions in HL-LHC 2017 4 p JACoW The luminosity reach of the HL-LHC experiments implies new constraints for the protection of the inner triplets from the machine debris. In general activation levels will increase a factor of 15-30 from the 2015 values (LS1), affecting both radiation tolerance of equipment and maintenance scenarios. The design of new equipment takes into account these constraints and the entire layout of tunnel equipment near the interaction regions will al-low for simplified maintenance. In particular, new ab-sorbers will replace the existing protection of the ma-chine-experiment cavern boundaries, with an optimised layout of the region. This paper summarises the main constraints (both physical and operational) existing at the region, together with the solutions adopted to reduce worker's dose. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW shielding JACoW operation JACoW radiation JACoW experiment JACoW vacuum CERN CERN HL-LHC Adorisio, Cristina JACoW-00094680 cristina.adorisio@cern.ch CERN Bergstrom, Ida JACoW-00100148 ida.bergstrom@cern.ch CERN Brethoux, Damien JACoW-00060475 damien.brethoux@cern.ch CERN Evrard, Sebastien INSPIRE-00249317 JACoW-00048742 CERN Gaddi, Andrea INSPIRE-00309061 JACoW-00052038 CERN Krzkempek, Lukasz JACoW-00100149 lukasz.piotr.krzempek@cern.ch CERN Lazzaroni, Michael JACoW-00035932 michael.lazzaroni@cern.ch CERN Perez Espinos, Jaime JACoW-00063332 jaime.perez.espinos@cern.ch CERN Raymond, Michel INSPIRE-00222353 JACoW-00094683 CERN Vincke, Heinz JACoW-00013080 heinz.vincke@cern.ch CERN WEPVA114 IPAC2017 C17-05-14 2017 1360917 1225135 http://cds.cern.ch/record/2289636/files/wepva114.pdf 13 WEPVA114 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2017-09-29 10:28:08 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 I. Bergstrom, H. Vincke EDMS 1448296, CERNRP--118-REPORTS-TN 1 Residual dose rates & scaling factors for CMS during foreseen long shutdowns following LHC operation until 3000/fb 2014 I. Bergstrom, H. Vincke EDMS 1448497 CERN-RP-119-REPORTS-TN 2 Residual dose rates and scaling factors in ATLAS during long shutdowns following the LHC operation until 4000/fb 2014 Radiation protection at CERN 3 https://arxiv.org/ftp/arxiv/papers/1303/1303.6519.pdf F. Sanchez Galan, I. Efthymiopoulos 5th Joint HL-LHC US LARP Annual meeting (Oct) 4 LHC VAX Displacement and impact on experiments 2015 F. Sanchez Galan, S. Evrard 6th Joint HL-LHC US LARP Annual meeting (Oct) 5 Final solution for VAX integration and new TREX mandate 2015 I. Bergstrom, H. Vincke, J. C Armenteros Carmona EDMS 1713941 CERN-RP--146-REPORTS-TN 6 Radiological assessment of the proposed installation of vacuum equipment upstream of TAXS at Points 1 and 5 2016 701721 A. Ferrari, P.R. Sala, A. Fassò, and J. Ranft INFN/TC_05/11 7 CERN-2005-10 SLAC-R-773 FLUKA: a multi-particle transport code 2005 1619967 T. T. Böhlen, F. Cerutti, M.P.W. Chin, A. Fassò, A. Ferrari, P.G. Ortega, A. Mairani, P.R. Sala, G. Smirnov and V. Vlachoudis 978-3-95450-182-3 Proceedings of IPAC2017, Copenhagen, Denmark WEPVA114 07 Accelerator Technology T21 Infrastructures 3543 Copyright©2017CC-BY-3.0andbytherespectiveauthors 8 Nucl.Data Sheets,120,211-214 The FLUKA Code: Developments and Challenges for High Energy and Medical Applications 2014 2289643 SzGeCERN 20180205163422.0 DOI JACoW 10.18429/JACoW-IPAC2017-MOPVA102 oai:inspirehep.net:1626275 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626275 2017-10-17T21:21:58Z 2017-10-18T04:00:43Z marcxml Inspire 1626275 eng CERN-ACC-2017-186 Apsimon, Robert JACoW-00035939 r.apsimon@lancaster.ac.uk Lancaster U. JACoW Modeling the Low Level RF Response on the Beam during Crab Cavity Quench 2017 4 p JACoW The High Luminosity Upgrade for the LHC (HL-LHC) relies on crab cavities to compensate for the luminosity reduction due to the crossing angle of the colliding bunches at the interaction points. In this paper we present the simulation studies of cavity quenches and the impact on the beam. The cavity voltage and phase during the quench is determined from a simulation in Matlab and used to determine the impact on the beam from tracking simulations in SixTrack. The results of this study are important for determining the required machine protection and interlock systems for HL-LHC. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW cavity JACoW simulation JACoW luminosity JACoW SRF JACoW klystron CERN CERN HL-LHC Appleby, Robert INSPIRE-00193766 JACoW-00012696 ORCID:0000-0001-8033-1923 U. Manchester (main) Baudrenghien, Philippe JACoW-00001644 philippe.baudrenghien@cern.ch CERN Burt, Graeme JACoW-00022092 graeme.burt@cockcroft.ac.uk Lancaster U. Dexter, Amos JACoW-00022163 ORCID:0000-0001-6660-9466 email:a.dexter@lancaster.ac.uk Lancaster U. Sjobak, Kyrre JACoW-00055115 kyrre.ness.sjoebaek@cern.ch CERN MOPVA102 IPAC2017 C17-05-14 2017 1360924 692048 http://cds.cern.ch/record/2289643/files/mopva102.pdf 13 MOPVA102 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-0-1-0-1 2017-09-29 10:25:07 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 HL-LHC technical design report, to be published 1 K. Sjobak et al. in Proc. 6th Int. Particle Accelerator Conf. (IPAC’16), Busan, Korea, May, paper THPOY043, pp. 4196-4199 2 Time Scale of Crab Cavity Failures Relevant for High Luminosity LHC 2016 K. Nakanishi et al. in Proc. 1st Int. Particle Accelerator Conf. (IPAC’10), Kyoto, Japan, May, paper WEPEC022, pp. 2938-2940 3 Beam Behaviour due to Crab Cavity Breakdown 2010 G. Robert-Demolaize, R. Assmann, S. Redaelli, and F. Schmidt in Proc. of PAC’05, paper FPAT081 4 A new version of SixTrack with collimation and aperture interface K. Sjobak, H. Burkhardt, R. De Maria, A. Mereghetti, and A. Santamaría García in Proc. 5th Int. Particle Accelerator Conf. (IPAC’15), Richmond, VA, USA, May, paper MOPJE069, pp. 468-471 5 General functionality for turn-dependent element properties in SixTrack 2015 A. Santamaría García et al. in Proc. 6th Int. Particle Accelerator Conf. (IPAC’16), Busan, Korea, May, paper TUPMW025, pp. 1485-1488 6 Machine protection from fast crab cavity failures in the High Luminosity LHC 2016 K. Sjobak and A. Santamaría García presentation at the 6th HL-LHC collaboration meeting, Paris, France, November, https: //indico.cern.ch/event/549979/contributions/ 2295073/attachments/1371504/2080340/-11-14_HLLHC_Paris-CrabFailures-Kyrre.pdf 7 Crab cavity failure modes and mitigation 2016 978-3-95450-182-3 Proceedings of IPAC, Copenhagen, Denmark MOPVA102 07 Accelerator Technology T07 Superconducting RF 1101 Copyright©CC-BY-3.0andbytherespectiveauthors 8 Methodical Accelerator Design http://madx.web.cern.ch/madx/ 2017 2289652 SzGeCERN 20180205163357.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPVA094 oai:inspirehep.net:1626286 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626286 2017-10-17T16:39:32Z 2017-10-18T04:00:43Z marcxml Inspire 1626286 eng CERN-ACC-2017-177 Vlachodimitropoulos, Vasileios JACoW-00094655 vasileios.vlachodimitropoulos@cern.ch CERN JACoW Study of an Improved Beam Screen Design for the LHC Injection Kicker Magnet for HL-LHC 2017 4 p JACoW During Run 1 of the LHC, one of the injection kicker magnets (MKIs) occasionally exhibited an excessively high ferrite temperature, caused by coupling of the high intensity beam to the real impedance of the magnet. Beam-screen upgrades have been very effective in reducing beam coupling impedance during Run 2. However, temperature measurements during LHC operation have shown that one end of the MKIs ferrite yoke is consistently hotter than the other: this effect is due to highly non-uniform beam induced power deposition along the kicker. Electromagnetic and thermal simulations show that part of the ferrite yoke will be above its Curie temperature when the LHC is operated with HL-LHC beam parameters, which could increase the turn-around time between fills of the LHC. An impedance mitigation study is presented in this paper with emphasis on the effect of the beam screen layout upon both total beam induced power deposition and its longitudinal distribution. Results of complex thermal simulations, to benchmark the effectiveness of the proposed schemes, are reported. To validate the proposed modification a test bench measurement was performed and preliminary results are discussed JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW impedance JACoW kicker JACoW injection JACoW simulation JACoW coupling CERN CERN HL-LHC Barnes, Michael INSPIRE-00064621 JACoW-00000086 CERN Ducimetière, Laurent INSPIRE-00540386 JACoW-00001690 CERN Vega Cid, Lorena JACoW-00085967 lorena.vega@cern.ch CERN Weterings, Wim JACoW-00004260 wim.weterings@cern.ch CERN WEPVA094 IPAC2017 C17-05-14 2017 1360933 1323826 http://cds.cern.ch/record/2289652/files/wepva094.pdf 13 WEPVA094 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-1-0-1-0-0-1 2017-09-29 10:16:45 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 L. Ducimetière, N. Garrel, M.J. Barnes, and G. Wait in Proc. PAC’03, Portland, Oregon, USA, May, pp. 1162-1164 1 The LHC injection kicker magnet 2003 H. Day Ph.D. thesis, School of Physics and Astronomy, The University of Manchester, Manchester, United Kingdom 2 Beam Coupling Impedance Reduction Techniques of CERN Kickers and Collimators 2013 M.J. Barnes et al. in Proc. IPAC’13, Shanghai, China, May, pp. 735-737 3 Reduction of surface flashover of the beam screen of the LHC injection kickers 2013 4 http://www.ferroxcube.com 5 http://www.cst.com H. Day et al. in Proc. IPAC’13, Shanghai, China, May, pp. 1649-1651 6 Evaluation of the beam coupling impedance of the new beam screen designs for the LHC injection kicker magnets 2013 M.J. Barnes et al. in Proc. IPAC’16, Busan, Korea, May, pp. 3623-3626 7 Operational experience of the upgraded LHC injection kicker magnets 2016 H. Day, M.J. Barnes, L. Ducimetière, L. Vega Cid, and W. Weterings in Proc. IPAC’16, Busan, South Korea, May, pp. 3615-3618 8 Current and future beam thermal behaviour of the LHC injection kicker magnets 2016 M.J. Barnes et al. presented at the IPAC’17, Copenhagen, Denmark, May, this conference 9 Operational experience of the upgraded LHC injection kicker magnets during Run 2 and future plans 2017 H. Day, M.J. Barnes, L. Coralejo-Feliciano in Proc. IPAC’15, Richmond, Virginia, USA, May, pp. 370-373 10 Impedance studies of the LHC injection kicker magnets for HL-LHC 2015 L. Vega Cid, M.J. Barnes, V. Vlachodimitropoulos, W. Weterings, A. Abánades presented at the IPAC’17, Copenhagen, Denmark, May, this conference 11 Themal analysis of the LHC injection kicker magnets 2017 H.Day, M.J. Barnes, F. Caspers, E. Metral, B. Salvant MKI Strategy Meeting, CERN, Geneva, Switzerland, Dec 12 Impedance reduction techniques in LHC injection kicker magnets 2014 T. Kroyer, F. Caspers, E.Gaxiola 978-3-95450-182-3 CERN, Geneva, Switzerland WEPVA094 Proceedings of IPAC, Copenhagen, Denmark 3474 Copyright©CC-BY-3.0andbytherespectiveauthors 07 Accelerator Technology T16 Pulsed Power Technology 13 AB-NOTE-2007-028 Longitudinal and transverse wire measurements for the evaluation of impedance reduction measures on the MKE extraction kickers 2017 2289659 SzGeCERN 20180205163328.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPVA113 oai:inspirehep.net:1626293 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626293 2017-10-17T20:41:47Z 2017-10-18T04:00:43Z marcxml Inspire 1626293 eng CERN-ACC-2017-170 Sacristan De Frutos, Oscar JACoW-00073967 oscar.sacristan@cern.ch CERN JACoW Thermo-Physical and Mechanical Characterisation of Novel Materials under Development for HL-LHC Beam Intercepting Devices 2017 4 p JACoW The collimation system for high energy particle accelerators as HL-LHC, must be designed to withstand the close interaction with intense and energetic particle beams, safely operating over an extended range of temperatures in extreme conditions (pressure, strain-rate, radiation), which are to become more demanding with the High Luminosity LHC. In order to withstand such conditions, the candidate materials must possess among other properties outstanding thermal shock resistance and high thermal and electrical conductivity, condition only met by advanced or novel materials. Therefore, an extensive R&D; program has been launched to develop novel materials capable of replacing or complementing materials used for present collimators. So far, Molybdenum Carbide - Graphite and Copper-Diamond composites have been identified as the most promising materials. Literature data are scarce or non-existing for these materials. For this reason the successive characterisation campaigns constitute a linchpin of the R&D; program. This paper reviews the experimental program followed for the thermo-physical and mechanical characterisation of the materials, and discusses the most relevant results. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW radiation JACoW experiment JACoW laser JACoW framework CERN CERN HL-LHC Bertarelli, Alessandro JACoW-00005409 alessandro.bertarelli@cern.ch CERN Bianchi, Laura JACoW-00094833 laura.bianchi@cern.ch CERN Carra, Federico JACoW-00046645 federico.carra@cern.ch CERN Guardia, Jorge JACoW-00094834 jorge.guardia@cern.ch CERN Guinchard, Michael JACoW-00022254 michael.guinchard@cern.ch CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN WEPVA113 IPAC2017 C17-05-14 2017 1360940 381768 http://cds.cern.ch/record/2289659/files/wepva113.pdf 13 WEPVA113 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-29 10:17:58 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 E. Quaranta et al. in Proc. IPAC', Busan, Korea,, WEPMW031 1 Towards Optimum Material Choices for the HL-LHC Collimator Upgrade 2016 F. Carra et al. in Proc. IPAC’14, Dresden, Germany,, MOPRO116 2 Mechanical Engineering and Design of Novel Collimators for HL-LHC 2014 S. Redaelli et al. LHC Performance Workshop, Chamonix, France 942040/attachments/1218992/1781341/SRedaelli_2 016-01-28_print.pdf 3 Collimation Upgrades for HLLHC https://indico.cern.ch/event/448109/contributions/1 2015 A. Bertarelli and S. Bizzarro International Patent WO//062657, 08-May- 4 A Molybdenum Carbide / Carbon Composite and Manufacturing Method 2015 M. Tomut presented at the EuCARD2-WP11 Annual Meeting, CERN, 31-Jan- 447021/attachments/1404149/2147923/Tomut_EuC ARD2_ann-meeting_-CERN.pdf 5 Update on irradiation test results at GSI and correlations to material damage simulation activity https://indico.cern.ch/event/606734/contributions/2 2017 M. Kitzmantel and E. Neubauer in Proc. SPIE 9346, vol. 9346,, pp. 934606-934606-11 6 Innovative hybrid heat sink materials with high thermal conductivities and tailored CTE 2015 ASTM International, ASTM B311-13. Standard Test Method for Density of Powder Metallurgy (PM) Materials Containing Less Than Two Percent Porosity 7 Deutsches Institut für Normung, DIN 51007:199406. Thermal analysis 8 differential thermal analysis 8 principles 8 ASTM International, E228-11, Standard Test Method for Linear Thermal Expansion of Solid Materials with a Push-Rod Dilatometer 9 2016 10 J.Appl.Phys.,32,1679-1684 Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity 1961 ASTM International, ASTM E2585-09, Standard Practice for Thermal Diffusivity by the Flash Method 11 2015 ASTM International, ASTM C1259-15, Standard Test Method for Dynamic Young’s Modulus, Shear Modulus, and Poisson’s Ratio for Advanced Ceramics by Impulse Excitation of Vibration 12 ASTM International, ASTM C651-15, Standard Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room Temperature 13 ASTM International, ASTM C695-15, Standard Test Method for Compressive Strength of Carbon and Graphite 14 1518560 M. Scapin, C. Fichera, F. Carra, and L. Peroni 15 EPJ Web Conf.,94,01021 Experimental investigation of the behaviour of tungsten and molybdenum alloys at high strain-rate and temperature 2015 M. Tomut et al. GSI scientific report APPAMML-MR-14, Darmstadt, Germany 16 Heavy ion induced radiation effects in novel molybdenum-carbide graphite composite materials 2014 1255202 A. Bertarelli et al. 17 Nucl.Instrum.Meth.,B308,88-99 An experiment to test advanced materials impacted by intense proton pulses at CERN HiRadMat facility 2013 F. Carra 978-3-95450-182-3 presented at the EuCARD-2 WP11 Topical Meeting - Collimator Materials for Fast High Energy Deposition, University of Malta, 28Apr-2016. Contribution 6. Proceedings of IPAC, Copenhagen, Denmark WEPVA113 07 Accelerator Technology T19 Collimation 3539 Copyright©CC-BY-3.0andbytherespectiveauthors 18 The HiRadMat 23 Experiments: results and analysis 2017 2289663 SzGeCERN 20180205163319.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPIK093 oai:inspirehep.net:1626300 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626300 2017-10-17T16:39:32Z 2017-10-18T04:00:43Z marcxml Inspire 1626300 eng CERN-ACC-2017-166 Maclean, Ewen JACoW-00044576 ORCID:0000-0002-1578-5176 email:ewen.hamish.maclean@cern.ch CERN JACoW New Methods for Measurement of Nonlinear Errors in LHC Experimental IRs and Their Application in the HL-LHC 2017 4 p JACoW Studies of nonlinear errors in LHC experimental insertions (IRs) during Run 1 were based upon feed-down to tune and coupling from the crossing angle orbit bumps. Useful for validating the magnetic model, this method alone is of limited use to understand discrepancies between magnetic and beam-based measurement. Feed-down from high-order multipoles is also difficult to observe. During Run 2 several alternative methods were tested in the LHC. This paper summarizes the results of these tests, and comments on their potential application to the High-Luminosity LHC upgrade. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW dipole JACoW resonance JACoW dynamic-aperture JACoW optics JACoW collider CERN CERN HL-LHC Carlier, Felix JACoW-00076287 felix.simon.carlier@cern.ch CERN Coello de Portugal, Jaime Maria JACoW-00072848 CERN Garcia-Tabares, Ana JACoW-00085372 ana.garcia-tabares.valdivieso@cern.ch CERN Giovannozzi, Massimo INSPIRE-00084987 JACoW-00001692 CERN Malina, Lukas INSPIRE-00641251 JACoW-00062354 ORCID:0000-0002-4673-6035 CERN Persson, Tobias JACoW-00051579 CERN Skowroński, Piotr INSPIRE-00355480 JACoW-00025478 CERN Tomás, Rogelio INSPIRE-00286070 JACoW-00003672 CERN WEPIK093 IPAC2017 C17-05-14 2017 1360944 259609 http://cds.cern.ch/record/2289663/files/wepik093.pdf 13 WEPIK093 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-29 10:15:49 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 E.H. Maclean Proceedings of the 7th Evian Workshop (Evian, 13-15 December) event/578001/contributions/2366314/attachments/1374391/ 2158727/EvianPaper.pdf 1 Nonlinear optics commissioning in the LHC https://indico.cern.ch/ 2016 E.H. Maclean Presentation to the 7th Evian Workshop (Evian, 13-15 December) event/578001/contributions/2366314/attachments/1374391/ 2113283/12 Evian.talk.v2.pdf 2 Nonlinear optics commissioning in the LHC https://indico.cern.ch/ 2016 L. Carver, M. Schenk, R. de Maria, K. Li, D. Amorim et al. and Non-Linear Errors", Tech. Rep 3 CERN-ACC-NOTE-2017-0012 MD1831: Single Bunch Instabilities with Q https://cds.cern.ch/record/2253143?ln 2017 1418897 G. Apollinari, I. B. Alonso, O. Bruning, M. Lamont, and L. Rossi Tech. Rep 4 CERN-2015-005 High-Luminosity Large Hadron Collider (HL-LHC) : Preliminary Design Report https://cds.cern.ch/record/2116337?ln 2015 E.H. Maclean 6th HL-LHC collaboration Meeting (Paris, 14-16 November) 2263212/attachments/1371461/2081287/-11-15 IRNLcorrecitons.pdf 5 Prospect for correction of nonlinear errors in HL-LHC experimental insertions https://indico.cern.ch/event/549979/contributions/ 2016 F.S. Carlier, J. C. de Portugal, A. García-Tabares, M. Giovannozzi, E.H. Maclean et al. Tech. Rep.,, unpublished 6 Optics Measurement and Correction strategies for the HL-LHC 2017 1408994 doi:10.1103/PhysRevSTAB.18.121002 E.H. Maclean, R. Tomás, M. Giovannozzi, and T.H.B. Persson Phys. Rev. Spec. Top. Accel. Beams, vol. 18, no. 121002 7 First measurement and correction of nonlinear errors in the experimental insertions of the CERN Large Hadron Collider http://journals.aps.org/prab/abstract/ 2015 F. Pilat, Y. Luo, N. Malitsky, and V.Ptitsyn in Proceedings of PAC’05, no. WOAC007 8 Beam-based non-linear optics corrections in colliders http://accelconf.web.cern.ch/AccelConf/p05/PAPERS/WOAC007.PDF 2005 S. White, E. Maclean, and R. Tomás Phys. Rev. ST. Accel. Beams, vol. 16, no. 071002 9 Direct amplitude detuning measurement with ac dipole http://prst-ab.aps.org/abstract/PRSTAB/v16/i7/e071002 2013 1091142 doi:10.1103/PhysRevSTAB.15.024001 M. Giovannozzi Phys. Rev. ST. Accel. Beams, vol. 15, no. 024001 10 Proposed scaling law for intensity evolution in hadron storage rings based on dynamic aperture variation with time https://journals.aps.org/prab/pdf/ 2012 M. Albert, G. Crockford, S. Fartoukh, M. Giovannozzi, E.H. Maclean et al. in Proceedings of IPAC, no. TUPPCO81 11 First experimental observations from the LHC dynamic aperture experiment http://accelconf.web.cern.ch/Accelconf/IPAC2012/papers/tuppc081.pdf 2012 E.H. Maclean, M. Giovannozzi, and R. Appleby In preparation 12 Novel method to measure the extension of stable phase space region of proton synchrotrons using Nekoroshev-like scaling laws S. Mönig, E.H. Maclean, T.H.B. Persson, J.M. Coello de Portugal, A. Langner, and R. Tomás in Proceedings of IPAC 16, no. THPMR044 13 Short Term Dynamic Aperture with AC Dipoles http://accelconf.web.cern.ch/AccelConf/ipac2016/papers/thpmr044.pdf 2016 F.S. Carlier and R. Tomás 978-3-95450-182-3 Unpublished. WEPIK093 Proceedings of IPAC, Copenhagen, Denmark 3158 Copyright©CC-BY-3.0andbytherespectiveauthors 05 Beam Dynamics and Electromagnetic Fields D02 Non-linear Single Particle Dynamics - Resonances, Tracking, Higher Order, Dynamic Aperture, Code 14 First Demonstration of Dynamic Aperture Measurements with an AC dipole 2017 2289670 SzGeCERN 20180205163302.0 DOI JACoW 10.18429/JACoW-IPAC2017-WEPIK033 oai:inspirehep.net:1626313 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626313 2017-10-17T20:42:25Z 2017-10-18T04:00:43Z marcxml Inspire 1626313 eng CERN-ACC-2017-159 Wiesner, Christoph JACoW-00035946 christoph.wiesner@cern.ch CERN JACoW LHC Beam Dump Performance in View of the High Luminosity Upgrade 2017 4 p JACoW The High Luminosity Large Hadron Collider (HL-LHC) project will increase the total beam intensity in the LHC by nearly a factor of two. Analysis and follow-up of recent operational issues as well as dedicated studies of the LHC Beam Dump System (LBDS) have been carried out to ensure the safe operation with HL-LHC parameters and to decide on possible hardware upgrades to meet the HL-LHC requirements. The fail-safe design must ensure the LBDS performance also for abnormal operation such as asynchronous beam dumps or failing dilution kickers. In this paper, we report on newly observed failure scenarios as the erratic firing of more than one dilution kicker, and discuss their consequences as well as possible mitigation measures in view of the high luminosity upgrade. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW kicker JACoW extraction JACoW operation JACoW proton JACoW hardware CERN CERN HL-LHC Bartmann, Wolfgang JACoW-00032601 wolfgang.bartmann@cern.ch CERN Bracco, Chiara JACoW-00021537 ORCID:0000-0002-4698-5429 email:chiara.bracco@cern.ch CERN Carlier, Etienne JACoW-00001684 etienne.carlier@cern.ch CERN Ducimetière, Laurent INSPIRE-00540386 JACoW-00001690 CERN Frankl, Matthias JACoW-00085650 matthias.immanuel.frankl@cern.ch CERN Fraser, Matthew JACoW-00037260 matthew.alexander.fraser@cern.ch CERN Goddard, Brennan INSPIRE-00545979 JACoW-00001570 ORCID:0000-0002-9902-2431 CERN Kramer, Thomas JACoW-00028413 thomas.kramer@cern.ch CERN Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN Magnin, Nicolas JACoW-00035445 CERN Mazzoni, Stefano JACoW-00060840 stefano.mazzoni@cern.ch CERN Meddahi, Malika INSPIRE-00106531 JACoW-00001621 CERN Senaj, Viliam JACoW-00039095 viliam.senaj@cern.ch CERN WEPIK033 IPAC2017 C17-05-14 2017 1360951 931592 http://cds.cern.ch/record/2289670/files/wepik033.pdf 13 WEPIK033 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-29 10:14:31 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 O. Brüning et al. LHC Design Report, Vol. I Chapter 17: Beam Dumping System, CERN, Geneva, Switzerland 1 2004 R. Veness, B. Goddard, S.J. Mathot, A. Presland, L. Massidda in Proc. EPAC’06, Edinburgh, Scotland, June, paper TUPLS123, pp. 1792-1794 2 Design of the LHC Beam Dump Entrance Window 2006 MAD-X 3 http://madx.web.cern.ch/madx/ A. Ferrari, P. R. Sala, A. Fassò, J. Ranft CERN, Geneva, Switzerland record/898301 4 FLUKA: A multi-particle transport code (program version 2005) https://cds.cern.ch/ 2005 L. Ducimetière et al. presented at the LHC Performance Workshop (Chamonix), Chamonix, France, January contributions/2366331/attachments/1399678/ 2136745/MKI_LBDS_2_Chamonix_.pdf 5 Injection kickers and LBDS: occasional storms https://indico.cern.ch/event/580313/ 2017 J. Uythoven EDMS no. 910572, CERN, Geneva, Switzerland, May Spec_MKD_and_MKB_waveform_V2.pdf 6 Naming of characteristic points of MKD and MKB waveforms, derived quantities and logical tests https://edms.cern.ch/ui/file/910572/2/ 2008 M.A. Fraser et al. 978-3-95450-182-3 in Proc. IPAC’16, Busan, Korea, May 2016, paper THPOR052, pp. 3911-3913. WEPIK033 Proceedings of IPAC, Copenhagen, Denmark 3002 Copyright©CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders T12 Beam Injection/Extraction and Transport 7 A Beam-Based Measurement of the LHC Beam Dump Kicker Waveform 2017 2289671 SzGeCERN 20180205163300.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA115 oai:inspirehep.net:1626322 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626322 2017-10-17T16:39:33Z 2017-10-18T04:00:43Z marcxml Inspire 1626322 eng CERN-ACC-2017-158 Rossi, Adriana JACoW-00001754 adriana.rossi@cern.ch CERN JACoW Progress with Long-Range Beam-Beam Compensation Studies for High Luminosity LHC 2017 4 p JACoW Long-range beam-beam (LRBB) interactions can be a source of emittance growth and beam losses in the LHC during physics and will become even more relevant with the smaller '* and higher bunch intensities foreseen for the High Luminosity LHC upgrade (HL-LHC), in particular if operated without crab cavities. Both beam losses and emittance growth could be mitigated by compensat-ing the non-linear LRBB kick with a correctly placed current carrying wire. Such a compensation scheme is currently being studied in the LHC through a demonstration test using current-bearing wires embedded into col-limator jaws, installed either side of the high luminosity interaction regions. For HL-LHC two options are considered, a current-bearing wire as for the demonstrator, or electron lenses, as the ideal distance between the particle beam and compensating current may be too small to allow the use of solid materials. This paper reports on the ongoing activities for both options, covering the progress of the wire-in-jaw collimators, the foreseen LRBB experiments at the LHC, and first considerations for the design of the electron lenses to ultimately replace material wires for HL-LHC. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW electron JACoW simulation JACoW cathode JACoW proton JACoW optics CERN CERN HL-LHC Aberle, Oliver JACoW-00005400 oliver.aberle@cern.ch CERN Albertone, Joel JACoW-00035522 joel.albertone@cern.ch CERN Barnyakov, Alexey JACoW-00056635 skalpel@inbox.ru Novosibirsk, IYF Bertarelli, Alessandro JACoW-00005409 alessandro.bertarelli@cern.ch CERN Boccard, Christian JACoW-00035524 christian.boccard@cern.ch CERN Carra, Federico JACoW-00046645 federico.carra@cern.ch CERN Cattenoz, Gregory JACoW-00058124 gregory.cattenoz@cern.ch CERN Delaup, Yorick JACoW-00100204 yorick.maxence.delaup@cern.ch CERN Fartoukh, Stephane INSPIRE-00443580 JACoW-00005763 CERN Fitterer, Miriam INSPIRE-00553909 JACoW-00035817 ORCID:0000-0001-9276-6051 Fermilab Gobbi, Giorgia JACoW-00094168 giorgia.gobbi@cern.ch CERN Lendaro, Jerome JACoW-00025408 jerome.lendaro@cern.ch CERN Levichev, Alexey JACoW-00034957 a.e.levichev@inp.nsk.su Novosibirsk, IYF Nikiforov, Danila JACoW-00071327 nikdanila@bk.ru Novosibirsk, IYF Papaphilippou, Yannis INSPIRE-00056849 JACoW-00000197 CERN Patapenka, Andrei INSPIRE-00738797 JACoW-00052462 Fermilab Perini, Diego INSPIRE-00290095 JACoW-00001734 CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN Schmickler, Hermann JACoW-00001600 hermann.schmickler@cern.ch CERN Stancari, Giulio JACoW-00004210 ORCID:0000-0001-7432-5906 email:stancari@fnal.gov Fermilab Valishev, Alexander INSPIRE-00472907 JACoW-00001212 Fermilab Zanoni, Carlo JACoW-00080618 carlo.zanoni@cern.ch CERN TUPVA115 IPAC2017 C17-05-14 2017 1360952 705732 http://cds.cern.ch/record/2289671/files/tupva115.pdf 13 TUPVA115 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-1-1-0-0-1 2017-09-28 23:54:04 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 D. Neuffer, S. Peggs SSC-63 1 1986 W. Herr (AP) 1 CERN-SL-90-06 1990 511170 (J. Poole and F. Zimmermann (eds.)) Proceedings of the Workshop on Beam-Beam Effects in Large Hadron Colliders—LHC99, Geneva, Switzerland (CERN Report No -AP) 2 CERN-SL-99-039 1999 511706 Y. Papaphilippou and F. Zimmermann in 3 Phys.Rev.ST Accel.Beams,2,104001 Weak-strong beambeam simulations for the Large Hadron Collider 1999 593610 Y. Papaphilippou and F. Zimmermann in 4 Phys.Rev.ST Accel.Beams,5,074001 Estimates of diffusion due to long-range beam-beam collisions 2002 J.-P. Koutchouk CERN 5 LHC-Project-Note-223 2000 Proc. PAC, Chicago, p. 1681 5 2001 1323495 F. Zimmermann in Contribution to the ICFA MiniWorkshop on Beam-Beam Effects in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 Mar, CERN Yellow Report pp.153-166 6 CERN-2014-004 10 years of wire excitation experiments in the CERN SPS 2013 S. Fartoukh Proceedings of the 2nd International Particle Accelerator Conference, San Sebastiáán, Spain (EPS-AG, Spain,), p. 2088 7 An Achromatic Telescope Squeezing (ATS) scheme for LHC upgrade 2011 S. Fartoukh et al. Proceedings of the International Particle Accelerator Conference (Richmond, VA, USA,), p. 2199 8 An alternative High Luminosity LHC with Flat Optics and Long-Range Beam-Beam Compensation 2015 F. Zimmermann CERNLHC-project-report-502 9 Weak-Strong Simulation Studies for the LHC Long-Range Beam-Beam Compensation 2004 1408090 S. Fartoukh et al. in 10 Phys.Rev.ST Accel.Beams,18,121001 Compensation of the long-range beambeam interactions as a path towards new configurations for the high luminosity LHC 2015 S. Fartoukh presented at the 2nd Workshop on Wire LRBB, Divonne, France, 20 Mar 11 Potential of wire compensation for (HL-)LHC & Optimal optics and hardware conditions 2017 A. Valishev et al. presented at the 2nd Workshop on Wire LRBB, Divonne, France, 20 Marand LARP CM28/HiLumi meeting, Napa, CA, 23-26 Apr 12 Simulation of LRBB Impact on Lifetime 2017 2nd Workshop on Wire LRBB, Divonne, France, 20 Mar 13 https://indico.cern.ch/event/615088/ 2017 A. Dallocchio et al. in Proceedings to IPAC 14 Collimators with embedded beam position monitors: A new advanced mechanical design 2011 1405870 doi:10.1007/978-1-4939-3317-4 V.D. Shiltsev ed., ISNB 978-1-4939-3317-4 15 Springer Electron Lenses for Super-Colliders 2016 L. Rossi in Proceedings of the 2nd International Particle Accelerator Conference, San Sebastiáán, Spain (EPS-AG, Spain,), p. 908 16 2011 G.I. Kuznetsov 17 Nucl.Instrum.Meth.,A340,204-208 High temperature cathodes for high current density 1994 G.I. Kuznetsov 18 J.Phys.Conf.Ser.,2,35-41 IrCe Cathodes For EBIS 2004 Y. Wang et al. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 54, NO. 5, MAY 19 Development of High Current-Density Cathodes With Scandia-Doped Tungsten Powders 2007 C. Zanoni and D. Perini Design Study of the Hollow Electron Lens for LHC 20 CERN-ACC-NOTE-20170004 A. Haeff PIRE 27, 586 21 Instability of beams of charged particles in a Plasma 1939 M. V. Nezlin 978-3-95450-182-3 Proceedings of IPAC2017, Copenhagen, Denmark TUPVA115 01 Circular and Linear Colliders A01 Hadron Colliders 2361 Copyright©2017CC-BY-3.0andbytherespectiveauthors 22 Sov.Phys.Usp.,13,608 1971 2289676 SzGeCERN 20180205163247.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA022 oai:inspirehep.net:1626327 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626327 2017-10-17T20:42:12Z 2017-10-18T04:00:43Z marcxml Inspire 1626327 eng CERN-ACC-2017-153 Valette, Matthieu JACoW-00060704 matthieu.valette@cern.ch CERN JACoW Requirements for Crab Cavity System Availability in HL-LHC 2017 4 p JACoW Crab Cavities will be installed in the High Luminosity LHC in order to increase the effective peak luminosity through a partial compensation of the geometric factor. This will allow extending the levelling time resulting in an increased production of integrated luminosity. Based on the availability of the LHC during 2016 operation, the expected yearly-integrated luminosity of the future HL-LHC was estimated using a Monte Carlo model. Crab cavity faults were added to the observed failure distribu-tions and their impact on integrated luminosity produc-tion as a function of fault time and fault frequency was studied. This allows identifying a breakeven point in luminosity production and defining minimum system availability requirements for the crab cavities to reach the design goal of 250 fb-1 of integrated luminosity per year. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW cavity JACoW optics JACoW operation JACoW proton CERN CERN HL-LHC Apollonio, Andrea JACoW-00054657 andrea.apollonio@cern.ch CERN Uythoven, Jan JACoW-00001565 jan.uythoven@cern.ch CERN Wollmann, Daniel INSPIRE-00373401 JACoW-00020820 CERN TUPVA022 IPAC2017 C17-05-14 2017 1360957 664996 http://cds.cern.ch/record/2289676/files/tupva022.pdf 13 TUPVA022 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:51:22 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 Report V High-Luminosity Large Hadron Collider (HL-LHC). Technical Design 01, G. Apollinari, I. Béjar Alonso, O. Brüning, P. Fessia, M. Lamont, L. Rossi, L. Tavian (eds.) 1 https://edms.cern.ch/document/1723851/0.71 R. Calaga et al. LHC performance workshop, Chamonix 2 Crab cavities for the LHC upgrade 2012 S. Fartoukh et al. in Proc. IPAC’15, Richmond, VA, USA, May 3 An alternative High Luminosity LHC with flat optics and long-range beam-beam compensation 2015 A. Apollonio et al. in Proc. IPAC’14, Dresden, Germany, June 4 Update on predictions for yearlyintegrated luminosity for HL-LHC based on expected machine availability 2014 A. Apollonio et al. presented at the 8th Int. Particle Accelerator Conf. (IPAC’17), Copenhagen, Denmark, May, paper TUPVA22, this conference 5 Lessons learnt from the 2016 LHC run and prospects for HL-LHC availability 2017 G. Burt et al. IET Conference on High Power RF Technologies, London, UK, Feb 6 The design of RF crab cavities for particle accelerators 2009 1323495 Y. Funakoshi et al. CERN Yellow Report pp.27-36 7 CERN-2014-004 Operational experience with crab cavities at KEKB K. Sjobaek et al. Proc. IPAC’16, Busan, Korea, May 8 Time Scale of Crab Cavity Failures relevant for High Luminosity LHC 2016 A. Santamaria Garcia et al. 978-3-95450-182-3 in Proc. IPAC’16, Busan, Korea, May 2016. TUPVA022 Proceedings of IPAC, Copenhagen, Denmark 2100 Copyright©CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 9 Machine protection from fast crab cavities failures in the High Luminosity LHC 2017 2289677 SzGeCERN 20180205163245.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA029 oai:inspirehep.net:1626328 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626328 2017-10-17T20:42:29Z 2017-10-18T04:00:43Z marcxml Inspire 1626328 eng CERN-ACC-2017-152 Buffat, Xavier JACoW-00046847 xavier.buffat@cern.ch CERN JACoW Observations of Emittance Growth in the Presence of External Noise in the LHC 2017 4 p JACoW Dedicated experiments were perfomed in the LHC to study the impact of noise on colliding high brightness beams. The results are compared to theoretical models and multiparticle tracking simulations. The impacts on the LHC operation and the HL-LHC project are discussed. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW emittance JACoW simulation JACoW damping JACoW brightness JACoW experiment CERN CERN HL-LHC Barranco García, Javier JACoW-00028384 javier.barranco@epfl.ch Ecole Polytechnique, Lausanne Pieloni, Tatiana JACoW-00004675 tatiana.pieloni@epfl.ch Ecole Polytechnique, Lausanne Tambasco, Claudia JACoW-00068755 claudia.tambasco@cern.ch Ecole Polytechnique, Lausanne CERN CERN, Geneva, Switzerland Valuch, Daniel JACoW-00004360 daniel.valuch@cern.ch CERN TUPVA029 IPAC2017 C17-05-14 2017 1360958 1158989 http://cds.cern.ch/record/2289677/files/tupva029.pdf 13 TUPVA029 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:51:33 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 1396896 P. Baudrenghien and T. Mastoridis 978-3-95450-182-3 Proceedings of IPAC2017, Copenhagen, Denmark TUPVA029 01 Circular and Linear Colliders A01 Hadron Colliders 2119 Copyright©2017CC-BY-3.0andbytherespectiveauthors 1 Phys.Rev.ST Accel.Beams,18,101001 Transverse emittance growth due to RF noise in the high-luminosity LHC crab cavities 2015 V. A. Lebedev in AIP Conference Proceedings 326.1, pp. 396-423 2 Emittance growth due to noise and its suppression with the feedback system in large hadron colliders 1995 Y. Alexahin Nucl. Instrum. Methods Phys. Res. A vol. 480.2, pp. 253-288 3 A study of the coherent beam-beam effect in the framework of Vlasov perturbation theory 2002 T. Pieloni Ph.D. thesis, EPFL 4 A Study of Beam-Beam Effects in Hadron Colliders with a Large Number of Bunches 2008 R. Alemany et al. CERN, Geneva, Switzerland, Rep MD, June 5 CERN-ATS-NOTE-2011-029 Head-on beam-beam tune shifts with high brightness beams in the LHC 2011 M. Albert et al. CERN, Geneva, Switzerland, Rep MD, July 6 CERN-ATS-NOTE-2011058 Head-on beam-beam collisions with high intensities and long range beam-beam studies in the LHC 2011 J. Barranco et al. CERN, Geneva, Switzerland, Rep Jan 7 CERN-ACC-NOTE-2016-0020 MD 400: LHC emittance growth in presence of an external source of noise during collision 2016 X. Buffat Ph.D. thesis, EPFL 8 Transverse beams stability studies at the Large Hadron Collider 2015 X. Buffat et al. 978-3-95450-182-3 in Proceedings of the 7th International Particle Accelerator Conference, Busan, South Korea, May 2016, paper TUPMW009. TUPVA029 Proceedings of IPAC, Copenhagen, Denmark 2120 Copyright©CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 9 Simulation of head-on beam-beam limitations in future high energy colliders 2017 2289678 SzGeCERN 20180205163243.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA030 oai:inspirehep.net:1626329 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626329 2017-10-17T16:39:33Z 2017-10-18T04:00:43Z marcxml Inspire 1626329 eng CERN-ACC-2017-151 Gonçalves Jorge, Patrik JACoW-00090878 patrik.jorge@epfl.ch Ecole Polytechnique, Lausanne JACoW Measurement of Beta-Beating Due to Strong Head-on Beam-Beam Interactions in the LHC 2017 4 p JACoW The LHC operation relies on a good knowledge of the optics, usually corrected in absence of beam-beam interactions. In a near future, both the LHC and the HL-LHC will need to cope with large head-on beam-beam parameters, the impact on the optics needs to be understood and, if necessary, corrected. The results of a dedicated experiment performed at injection energy are discussed in this paper. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW dipole JACoW emittance JACoW optics JACoW simulation JACoW injection CERN CERN HL-LHC Barranco García, Javier JACoW-00028384 javier.barranco@epfl.ch Ecole Polytechnique, Lausanne Buffat, Xavier JACoW-00046847 xavier.buffat@cern.ch CERN Carlier, Felix JACoW-00076287 felix.simon.carlier@cern.ch CERN Coello de Portugal, Jaime Maria JACoW-00072848 CERN Fol, Elena JACoW-00100196 elena.fol@cern.ch CERN Medina Medrano, Luis JACoW-00074732 luis.eduardo.medina.medrano@cern.ch CERN Pieloni, Tatiana JACoW-00004675 tatiana.pieloni@epfl.ch Ecole Polytechnique, Lausanne Tomás, Rogelio INSPIRE-00286070 JACoW-00003672 CERN Wegscheider, Andreas JACoW-00099515 andreas.wegscheider@cern.ch CERN TUPVA030 IPAC2017 C17-05-14 2017 1360959 821542 http://cds.cern.ch/record/2289678/files/tupva030.pdf 13 TUPVA030 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:51:44 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 T. Pieloni et al. in Proc. of HB, Malmo, Sweden, Jul., paper MOPR027, pp. 136-139 1 Dynamic beta and beta-beating effects in the presence of the beam-beam interactions 2016 L. Medina, R. Tomás, X. Buffat, J. Barranco, and T. Pieloni Presented at IPAC’17, Copenhagen, Denmark, May, paper TUPVA030 2 Correction of beta-beating due to beam-beam for LHC and its impact on dynamic aperture 2017 D. Boussard, T. Linnecar, and W. Höfle CERN, Geneva, Switzerland, Rep -HRF 3 SL-NOTE-99-055 The LHC transverse damper (ADT) performance specification http://cdsweb.cern.ch/record/702559 1999 M. Bai et al. in Proc. of the 22nd Particle Accelerator Conf., Albuquerque, New Mexico, USA 4 Considerations for an AC dipole for the LHC 2007 680878 R. Tomás 5 Phys.Rev.ST Accel.Beams,8,024401 Adiabaticity of the ramping process of an AC dipole 2005 R. J. Steinhagen et al. CERN, Geneva, Switzerland, Rep 6 CERN-BE-2011-016 Advancements in the base-band-tune and chromaticity instrumentation and diagnostics systems during LHCs first year of operation 2011 G. Trad private communication, Mar 7 2017 R. Miyamoto Ph.D. thesis, Texas University, USA 8 Diagnostics of the Fermilab Tevatron using an AC dipole 2008 829988 M. Aiba et al. 9 Phys.Rev.ST Accel.Beams,12,081002 First β-beating measurement and optics analysis for the CERN Large Hadron Collider 2009 882698 R. Tomás et al. 10 Phys.Rev.ST Accel.Beams,13,121004 CERN Large Hadron Collider optics model, measurements, and corrections 2010 A. Langner et al. 978-3-95450-182-3 Phys. Rev. w Accel. Beams, Vol. 19, 092803, 2016. TUPVA030 Proceedings of IPAC, Copenhagen, Denmark 2124 Copyright©CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 11 Utilizing the N beam position monitor method for turn-by-turn optics measurements 2017 2289684 SzGeCERN 20180205161049.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA006 oai:inspirehep.net:1626341 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626341 2017-10-17T20:43:07Z 2017-10-18T04:00:43Z marcxml Inspire 1626341 eng CERN-ACC-2017-145 Apollonio, Andrea JACoW-00054657 andrea.apollonio@cern.ch CERN JACoW Lessons Learnt from the 2016 LHC Run and Prospects for HL-LHC Availability 2017 4 p JACoW The LHC exhibited unprecedented availability during the 2016 proton run, producing about 40 fb-1 of integrated luminosity, surpassing the sum of production during the 4 previous years. This was achieved while running steadily with a peak luminosity above the design target of 1034 cm- 2s^{−1}. Individual system performance and an increased experience operating the LHC were fundamental for these achievements, following the consolidations and improvements deployed during the Long Shutdown 1 and the Year End Technical Stop in 2015. The implications of this excellent performance in the context of the High Luminosity LHC are discussed in this paper, with the goal of defining the possible integrated luminosity reach of HL-LHC when considering the different operating conditions and the newly developed systems and technologies. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW proton JACoW target JACoW radiation JACoW operation CERN CERN HL-LHC Rey Orozko, Odei JACoW-00068875 odei.rey.orozco@cern.ch CERN Schmidt, Ruediger JACoW-00001714 rudiger.schmidt@cern.ch CERN Valette, Matthieu JACoW-00060704 matthieu.valette@cern.ch CERN Wollmann, Daniel INSPIRE-00373401 JACoW-00020820 CERN Zerlauth, Markus JACoW-00001567 markus.zerlauth@cern.ch CERN TUPVA006 IPAC2017 C17-05-14 2017 1360965 730994 http://cds.cern.ch/record/2289684/files/tupva006.pdf 13 TUPVA006 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:50:18 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 B. Todd, L. Ponce, A. Apollonio 1 CERN-ACC-NOTE-20160047 LHC Availability 2016: Restart to Technical Stop 1 2016 B. Todd, L. Ponce, A. Apollonio CERN-ACCNOTE--0066 2 LHC Availability 2016: Technical Stop 1 to Technical Stop 2 2016 B. Todd, L. Ponce, A. Apollonio CERN-ACCNOTE--0065 3 LHC Availability 2016: Technical Stop 2 to Technical Stop 3 2016 B. Todd, L. Ponce, A. Apollonio -0067 4 CERN-ACC-NOTE-016 LHC Availability 2016: Proton Physics 2016 A. Apollonio et al. in Proc. IPAC’16, paper TUPMB040 5 LHC Accelerator Fault Tracker: First Experience 2016 S. Rowan et al. in Proc. IPAC’15, paper TUPTY045 6 Interactions Between Macroparticles and High-energy Proton Beams 2015 L. Mether et al. in Proc. LHC Beam Operations Workshop, Evian 7 Electron Cloud in 2016: Cloudy or Clear? 2016 M. Valette et al. in Proc. IPAC’17, Copenhagen Denmark, May, paper TUPVA022, this conference 8 Requirements for Crab Cavity System Availability in HL-LHC 2017 A. Apollonio et al. 978-3-95450-182-3 in Proc. IPAC’13, paper TUPFI012, 2013. TUPVA006 Proceedings of IPAC2017, Copenhagen, Denmark Copyright©2017CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders A01 Hadron Colliders 9 HL-LHC: Integrated Luminosity and Availability 2042 2289687 SzGeCERN 20180205160924.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPVA015 oai:inspirehep.net:1626344 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626344 2017-10-17T11:27:40Z 2017-10-18T04:00:43Z marcxml Inspire 1626344 eng CERN-ACC-2017-142 Martinella, Corinna JACoW-00094824 corinna.martinella@cern.ch CERN JACoW Radiation Levels at the LHC: 2012, 2015 and 2016 Proton Physics Operations in View of HL-LHC requirements 2017 3 p JACoW The variety of beam losses produced in the Large Hadron Collider (LHC) creates a mixed and complex radiation field. During 2012, 2015 and 2016, Beam Loss Monitors and RadMons were used to monitor the inte-grated dose and the High Energy Hadrons fluence in order to anticipate the electronics degradation and inves-tigate the cause of failures. The annual radiation levels are compared; highlighting the mechanisms in the pro-duction of beam losses and the impact of the different squeeze and crossing angle. In addition, the increase of beam-gas interaction is discussed comparing operations at 25 ns and 50 ns bunch spacing. A strategy is presented to allow for a continuous respective evaluation during the upcoming LHC and future High Luminosity LHC (HL-LHC) operations. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW radiation JACoW operation JACoW proton JACoW insertion CERN CERN HL-LHC Brugger, Markus INSPIRE-00413534 JACoW-00005555 CERN Danzeca, Salvatore JACoW-00094825 salvatore.danzeca@cern.ch CERN Garcia Alia, Ruben JACoW-00063848 ruben.garcia.alia@cern.ch CERN Kadi, Yacine JACoW-00004380 yacine.kadi@cern.ch CERN Stein, Oliver JACoW-00068652 oliver.stein@cern.ch CERN Xu, Chen JACoW-00085512 chen.xu@cern.ch CERN TUPVA015 IPAC2017 C17-05-14 2017 1360968 769445 http://cds.cern.ch/record/2289687/files/tupva015.pdf 13 TUPVA015 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:50:48 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 K. Røed et al. IEEE Trans. Nucl. Sci., vol 59, no 4, August 1 Method for Measuring Mixed Field Radiation Levels Relevant for SEEs at the LHC 2012 G. Spiezia et al. PoS, vol. RD11, p. 024 2 The LHC Radiation Monitoring System - Radmon 2011 E.B. Holzer et al. 978-3-95450-182-3 Proceedings of HB2010, Morschach, Switzerland, 2010. Proceedings of IPAC2017, Copenhagen, Denmark TUPVA015 01 Circular and Linear Colliders A01 Hadron Colliders Copyright©2017CC-BY-3.0andbytherespectiveauthors 3 COMMISSIONING AND OPTIMIZATION OF THE LHC BLM SYSTEM 2077 2289691 SzGeCERN 20180205160722.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPIK085 oai:inspirehep.net:1626352 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626352 2017-10-17T11:27:40Z 2017-10-18T04:00:43Z marcxml Inspire 1626352 eng CERN-ACC-2017-138 Mainaud Durand, Helene JACoW-00036292 helene.mainaud.durand@cern.ch CERN JACoW HL-LHC Alignment Requirements and Associated Solutions 2017 4 p JACoW To increase by more than 10 times the luminosity reach w.r.t the first 10 years of the LHC lifetime, the HL-LHC project will replace nearly 1.2 km of the accelerator during the Long Shutdown 3 scheduled in 2024 [1][2][3]. This paper presents the HL-LHC alignment and internal metrology requirements of all the new components to be installed, from the magnet components to the beam instrumentation and vacuum devices. As for the LHC, a combination of Hydrostatic Levelling Sensors (HLS) and Wire Positioning Sensors (WPS) is proposed for the alignment of the main components, but on a longer distance (210 m instead of 50 m), generating technical challenges for the installation of the stretched wire and for the maintenance of the alignment systems. Innovative measurements methods and instrumentation are under study to perform the position monitoring inside a cryostat of cold masses and crab cavities, in a cold (2K) and radioactive (1 MGy/year) environment, as well as to carry remote measurements in the tunnel of the intermediary components. The proposed solutions concerning the determination of the position and the re-adjustment of the components are detailed in this paper. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW alignment JACoW quadrupole JACoW target JACoW vacuum JACoW monitoring CERN CERN HL-LHC Bartolome-Jimenez, Sonia JACoW-00005885 sonia.bartolome@cern.ch CERN Dijoud, Thibault JACoW-00081875 thibault.dijoud@cern.ch CERN Duquenne, Mathieu JACoW-00068798 mathieu.duquenne@cern.ch ESGT, Le Mans Herty, Andreas JACoW-00036298 andreas.herty@cern.ch CERN Rude, Vivien JACoW-00055696 vivien.rude@cern.ch ESGT, Le Mans Sosin, Mateusz JACoW-00047984 mateusz.sosin@cern.ch CERN TUPIK085 IPAC2017 C17-05-14 2017 1360972 840770 http://cds.cern.ch/record/2289691/files/tupik085.pdf 13 TUPIK085 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:48:42 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 1418897 doi:10.5170/CERN-2015-005 (G. Apollinari, I. Bejar Alonso, O. Brüning, M. Lamont, L. Rossi (eds.)) High-Luminosity Large Hadron Collider (HL-LHC). Prelimary Design Report CERN, Geneva,. DOI: 1 CERN-2015005 2015 1614099 I. Bejar et al. CERN, Geneva 2 CERN-ACC-2015-0140 HiLumi LHC Technical Design Report http://cds.cern.ch/search?p=CERN-ACC-2015-0140 2015 L. Rossi "LHC Upgrade plans: options and strategy’’, proceedings of IPAC, San Sebastian, Spain,, pp. 908-912 3 http://accelconf.web.cern.ch/AccelConf/IPAC2011/papers/tuya02.pdf 2011 H. Mainaud Durand et al. IWAA Japan 4 KEK The remote positioning of the LHC inner triplet 2008 J-P Quesnel LHC-GES-0003 5 CERN-2000 Positioning of the LHC magnets J-F Fuchs 6 CERN-2016 The smoothing of the magnets of the LHC ring (final positioning) H. Mainaud Durand LHC-G-ES-0016 7 CERN-2016 Alignment requirements for the LHC low beta triplet H. Mainaud Durand et al. IWAA, DESY, Germany 8 Permanent monitoring of the LHC low beta triplets: latest results and perspectives 2010 H. Mainaud Durand et al. IWAA, Beijing, China, 2014 9 CERN-ACC-2015-0089 Remote qualification of HLS and WPS in the LHC tunnel 2004 M. Fitterer et al. 4, 19/01/ 10 CERN-ATS-2015-001 Crossing scheme and orbit correction in IR1/5 for HL-LHC 2015 C. Adorisio Edms n° 1770902, March 11 Results on residual dose in the LSS (D2Q6) 2017 H. Mainaud Durand Edms n°1744018 12 HL-LHC tolerances of alignment in LSS1 and LSS5 Etalon AG: 13 http://www.etalon-ag.com/en/products/absolute-multiline-technology/ V. Rude et al. IWAA, ESRF, October 14 Validation of the crab cavities internal monitoring strategy 2016 M. Sosin et al. IPAC, Busan, Korea,, CERNACC--197 15 Position Monitoring System for HL-LHC crab cavities 2016 A. Herty et al. IWAA, ESRF, France 16 Hydrostatic Levelling Sensors based on extrinsic fibre Fabry-Perot interferometer technology 2016 P. Bestmann et al. IWAA, DESY, Germany 17 The LHC collimator survey train 2010 M. Duquenne et al. IWAA, ESRF, France 18 Improving 3D longitudinal network measurement by using stretched wire 2016 M. Sosin et al. 978-3-95450-182-3 IPAC 2014, Dresden, Germany, 2014, pp. TUPR1095. TUPIK085 Proceedings of IPAC, Copenhagen, Denmark 1896 Copyright©CC-BY-3.0andbytherespectiveauthors 06 Beam Instrumentation, Controls, Feedback and Operational Aspects T17 Alignment and Survey 19 Design and study on a 5 Degree of Freedom adjustment platform for CLIC Drive Beam quadrupoles 2017 2289694 SzGeCERN 20180205160538.0 DOI JACoW 10.18429/JACoW-IPAC2017-TUPIK089 oai:inspirehep.net:1626355 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626355 2017-10-17T11:27:40Z 2017-10-18T04:00:43Z marcxml Inspire 1626355 eng CERN-ACC-2017-135 Medina Medrano, Luis JACoW-00074732 luis.eduardo.medina.medrano@cern.ch CERN Unlisted, MX UGTO, Leon, Mexico JACoW Studies on Luminous Region, Pile-up and Performance for HL-LHC Scenarios 2017 4 p JACoW Studies on luminous region and pile-up density are of great interest for the experiments at the future High Luminosity LHC (HL-LHC) in order to optimize the detector performance. The evolution of these parameters at the two main interaction points of the HL-LHC along optimum physics fills is studied for the baseline and alternative operational scenarios with the latest set of parameters, including a refined description of the longitudinal bunch profile. Results are discussed in terms of a new figure-of-merit, the effective pile-up density. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW luminosity JACoW operation JACoW simulation JACoW optics JACoW detector CERN CERN HL-LHC Arduini, Gianluigi INSPIRE-00163703 JACoW-00001676 CERN Tomás, Rogelio INSPIRE-00286070 JACoW-00003672 CERN TUPIK089 IPAC2017 C17-05-14 2017 1360975 316496 http://cds.cern.ch/record/2289694/files/tupik089.pdf 13 TUPIK089 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-1-0-1-1-0-1 2017-09-28 23:49:16 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 (G. Apollinari, I. Béjar Alonso, O. Brüning, M. Lamont, and L. Rossi (eds.)) pp. 49-56 1 High-luminosity Large Hadron Collider (HL-LHC) Technical Design Report V0 Geneva,, unpublished doc/1558149 1 https://edms.cern.ch/ui/ 2015 R. Tomás 6th HL-LHC Collaboration Meeting, Paris, Nov contributions/2257122/attachments/1370681/ 2079634/SLIDESBeamer.pdf 2 Updated optics layout and machine performance https://indico.cern.ch/event/549979/ 2016 E. Shaposhnikova and J.E. Muller 78th HL-LHC WP2 Meeting, Sep 563288/contributions/2308739/attachments/ 1342048/2021482/HLLHC_WP2_v1.pdf 3 Longitudinal stability limits and bunch length specifications https://indico.cern.ch/event/ 2016 L. Medina Ninth Experimental Data Quality Meeting, Apr. 2016 contributions/2529217/attachments/1442351/ 2221162/-04-10_HLLHC-EDQ.pdf 4 Update on beam parameters and operation schemes https://indico.cern.ch/event/626264/ 2017 D. Pellegrini, S. Fartoukh, N. Karastathis, and Y. Papaphilippou presented at the 8th International Particle Accelerator Conference (IPAC’17), Copenhagen, Denmark, May, paper TUPVA010, this conference 5 Multiparametric response of the HL-LHC dynamic aperture in presence of beam-beam effects 2017 E. Shaposhnikova and J.E. Muller 82nd HL-LHC WP2 Meeting, Jan contributions/2423329/attachments/1394442/ 2125205/HL-LHC_WP2_Jan17.pdf 6 Bunch length and particle distribution for (HL-)LHC https://indico.cern.ch/event/572439/ 2017 S. Papadopoulou et al. presented at the 8th International Particle Accelerator Conference (IPAC’17), Copenhagen, Denmark, May, paper TUPVA044, this conference 7 Modelling and measurements of bunch profiles at the LHC 2017 B. Petersen ECFA High Luminosity LHC Experiments Workshop, Oct contributions/2235126/attachments/1346960/ 2031430/StatusAndPlans.pdf 8 ATLAS upgrade status and outlook https://indico.cern.ch/event/524795/ 2016 P. Azzi ECFA High Luminosity LHC Experiments Workshop, Oct contributions/2235253/attachments/1347082/ 2031647/EDQCMS_ECFA_Azzi.pdf 9 CMS performance: Dependence on scenario for luminous region https://indico.cern.ch/event/524795/ 2016 doi:10.1007/s00032-008-0087-y S. Umarov, C. Tsallis, and S. Steinberg Milan Journal of Mathematics, vol. 76, no. 1, pp. 307-328 10 On a q-central limit theorem consistent with nonextensive statistical mechanics 2008 L. Medina and R. Tomás 978-3-95450-147-2 in Proc. 7th International Particle Accelerator Conference (IPAC’16), Busan, Korea, May, paper TUPMW035, pp. 1516-1519 doi:10.18429/JACoW 11 IPAC2016-TUPMW035 Performance and operational aspects of HL-LHC scenarios http://jacow.org/ipac2016/papers/tupmw035.pdf 2016 E. Shaposhnikova and J.E. Müller 978-3-95450-147-2 978-3-95450-182-3 in Proc. 7th International Particle Accelerator Conference (IPAC’16), Busan, Korea, Mar. 2016, paper WEPMW008, pp. 2430-2433 doi:10. 18429/JACoW 2016. Proceedings of IPAC2017, Copenhagen, Denmark TUPIK089 01 Circular and Linear Colliders A01 Hadron Colliders Copyright©2017CC-BY-3.0andbytherespectiveauthors 12 IPAC2016-WEPMW008 Possible beam parameters in double RF operation of the CERN LHC http://jacow.org/ipac2016/papers/wepmw008.pdf 1911 2289709 SzGeCERN 20180205155308.0 DOI JACoW 10.18429/JACoW-IPAC2017-MOPAB004 oai:inspirehep.net:1626376 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN INSPIRE:HEP ForCDS http://inspirehep.net/oai2d oai:inspirehep.net:1626376 2017-10-17T20:43:51Z 2017-10-18T04:00:43Z marcxml Inspire 1626376 eng CERN-ACC-2017-120 Bahamonde Castro, Cristina JACoW-00085651 CERN JACoW Improved Protection of the Warm Magnets of the LHC Betatron Cleaning Insertion 2017 4 p JACoW After the High Luminosity (HL) upgrade in 2024-2026, the LHC is anticipated to increase its integrated luminosity by a factor of 10 beyond its original design value of 300 fb-1. In preparation for this, several improvements to the equipment will already be implemented during the next Long Shutdown (LS2) starting in 2019. In the betatron cleaning insertion, the debris leaking out of several collimators will deposit energy in the downstream warm magnets, causing long-term radiation damage. A new layout has been proposed in which the most exposed magnet of each assembly is removed, reducing the assembly from 6 to 5 magnet units and gaining 2 spare magnets. New absorbers are therefore required to enhance the shielding of the remaining magnet string. In this paper, we present an evaluation of the dose to the warm magnets for post-LS2 operation, and we quantify the achievable reduction of the long-term radiation damage for different absorber configurations. A solution for an improved magnet protection that fulfills the HL-LHC requirements is proposed. JACoW CC-BY-3.0 http://creativecommons.org/licenses/by/3.0/ SzGeCERN Accelerators and Storage Rings JACoW shielding JACoW radiation JACoW operation JACoW luminosity JACoW collimation CERN CERN HL-LHC Cerutti, Francesco INSPIRE-00344024 JACoW-00032797 CERN Fessia, Paolo JACoW-00005505 paolo.fessia@cern.ch CERN Lechner, Anton JACoW-00052129 anton.lechner@cern.ch CERN Mereghetti, Alessio JACoW-00036877 alessio.mereghetti@cern.ch CERN Mirarchi, Daniele JACoW-00044537 daniele.mirarchi@cern.ch CERN Redaelli, Stefano INSPIRE-00373392 JACoW-00001564 CERN Skordis, Eleftherios JACoW-00060489 eleftherios.skordis@cern.ch U. Liverpool (main) CERN CERN, Geneva, Switzerland MOPAB004 IPAC2017 C17-05-14 2017 1360990 1075246 http://cds.cern.ch/record/2289709/files/mopab004.pdf 13 MOPAB004 2263434 copenhagen20170514 ARTICLE ConferencePaper 0-0-0-1-0-0-1 2017-09-28 23:42:41 Invenio/1.1.2.1260-aa76f refextract/1.5.44 content.pdf;1 1424712 S. Redaelli in Proc. Joint Int. Accelerator School, Newport Beach, CA, USA, 5 - 14 Nov, pp.403-437 1 CERN-2016-002 Beam Cleaning and Collimation Systems 2014 R. Assmann, M. Magistris, O. Aberle, M. Mayer, F. Ruggiero, J.Jimenez, S.Calatroni, A.Ferrari, G.Bellodi, I. Kurochkin et al. in Proc. EPAC, Edinburgh, Scotland,, paper TUODFI01,pp.986-988 2 The final collimation system for the LHC 2006 1479366 P. Fessia, N. Mairani, F. Cerutti, E. Gallay, M. Guinchard, E. Skordis, D. Tommasini 3 IEEE Trans.Appl.Supercond.,26,4004005 LHC Normal Conducting Magnets Toward HL-LHC and Beyond: Life Span Evaluations, Corrective Actions, and Future Upgrades 2016 B. Salvachua, R. Bruce, M. Brugger, F. Cerutti, S. Redaelli in Proc. 4th Int. Particle Accelerator Conf. (IPAC’13), 12-17 May, Shanghai, China, pp.1011 4 Estimate of Warm Magnets Lifetime in the Betatron and MOPAB004 Proceedings of IPAC2017, Copenhagen, Denmark 978-3-95450-182-3 74 Copyright©2017CC-BY-3.0andbytherespectiveauthors 01 Circular and Linear Colliders T19 Collimation Momentum Cleaning Insertions of the LHC 2013 E. Skordis et al. in Proc. IPAC’15, Richmond, USA, paper TUPTY046 5 Impact of Beam Losses in the LHC Collimation Regions P. Fessia in 3rd Joint HL-LHC-LRP Annual Meeting, 11-15th November, Daresbury Laboratory 6 Present baseline of HL-LHC integration 2013 P. Fessia 14th HLLHC TCC 7 CERN-2016 Radiation levels of MBW and MQW O. Brüning in Proc. 6th Int. Particle Accelerator Conf. (IPAC’15), 3-8 May, Richmond, VA, USA, paper FRXC2 8 The High Luminosity LHC Project 2015 1619967 T.T. Böhlen, F. Cerutti, M.P.W. Chin, A. Fassò, A. Ferrari, P.G. Ortega, A. Mairani, P.R. Sala, G. Smirnov and V. Vlachoudis 9 Nucl.Data Sheets,120,211-214 The FLUKA Code: Developments and Challenges for High Energy and Medical Applications 2014 701721 A. Ferrari, P.R. Sala, A. Fasso, and J. Ranft INFN/TC_05/11 10 CERN-2005-10 SLAC-R-773 FLUKA: a multi-particle transport code 2005 A. Mereghetti et al. in Proc.IPAC’12, New Orleans, Louisiana, USA, paper WEPPD071, pp.2687-2689 11 The FLUKA LineBuilder and Element Database: Tools for Building Complex Models of Accelerator Beam Lines F. Schmidt CERN, Geneva, Switzerland, Rep 12 CERN-SL-9456 SixTrackVersion 4.2.16 Single Particle Tracking Code Treating Transverse Motion with Synchrotron Oscillations in a Symplectic Manner 2012 394965 G. Ripken and F. Schmidt CERN, Geneva, Switzerland, Rep (AP) 13 CERN-SL-95-12 A symplectic six-dimensional thin-lens formalism for tracking 1995 R. De Maria et al. in Proc. IPAC’13, Shanghai, China,, pp. 948-950 14 Recent developments and future plans for SixTrack 2013 A. Mereghetti in Proc. 4th Int. Particle Accelerator Conf., 12-17 May, Shanghai, China, paper WEPEA064 15 SixTrack-FLUKA Active Coupling for the Upgrade of the SPS Scrapers 2013 C. Bracco et al. In Proc.PAC’07, paper YUPAN087, pp. 1577-1579 16 Scenarios for beam commissioning of the LHC collimation system D. Mirarchi et al. in Proc. IPAC’16, paper WEPMW030 17 Cleaning performance of the collimation system of the high luminosity Larger Hadron Collider LHC design report, Vol. 1. The LHC main ring -V-1,CERN, Geneva 18 CERN-2004-003 2004 C. Bahamonde Castro 978-3-95450-182-3 ColUSM 76th, 77th, 81st, 83rd, CERN, Geneva, 2016. Proceedings of IPAC, Copenhagen, Denmark MOPAB004 01 Circular and Linear Colliders T19 Collimation 75 Copyright©CC-BY-3.0andbytherespectiveauthors 19 Simulations of new passive absorbers in IR7 Update on new TCAP collimators Update on TCAP simulation Update TCAPs and final design 2017