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CERN Accelerating science

Published Articles

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2024-06-18
07:49
LHC Optics Measurements from Transverse Damper for the High Intensity Frontier / Nissinen, Tuuli (CERN) ; Carlier, Felix (CERN) ; Le Garrec, Mael (CERN) ; Maclean, Ewen (CERN) ; Persson, Tobias (CERN) ; Tomás García, Rogelio (CERN) ; Wegscheider, Andreas (CERN)
Current and future accelerator projects are pushing the brightness and intensity frontier, creating new challenges for turn-by-turn based optics measurements. Transverse oscillations are limited in amplitude due to particle losses. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 479-482 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.479-482

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2024-06-18
07:49
Detector Response Studies of the ESS Ionization Chamber / Dolenc Kittelmann, Irena (ESS, Lund) ; Boutachkov, Plamen (Darmstadt, GSI) ; Effinger, Ewald (CERN) ; Grishin, Viatcheslav ; Lernevall, Anders ; Viganò, William ; Zamantzas, Christos
The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be a pulsed neutron source based on a proton linac. The ESS linac is designed to deliver a 2GeV beam with peak current of 62.5mA at 14 Hz to a rotating tungsten target for neutron production. [...]
2023 - 4 p. - Published in : JACoW IBIC 2023 (2023) TUP004 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.TUP004

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2024-06-18
07:49
Detailed Magnetic Model Simulations of the H− Injection Chicane Magnets for the CERN PS Booster Upgrade, including Eddy Currents, and Influence on Beam Dynamics / Benedetto, Elena (CERN) ; Balhan, Bruno (CERN) ; Borburgh, Jan (CERN) ; Carli, Christian (CERN) ; Martini, Michel (CERN) ; Forte, Vincenzo (Clermont-Ferrand U. ; CERN)
The CERN PS Booster will be upgraded with an H^{−} injection system. The chicane magnets for the injection bump ramp-down in 5 ms and generate eddy currents in the inconel vacuum chamber which perturb the homogeneity of the magnetic field. [...]
2014 - 3 p. - Published in : 10.18429/JACoW-IPAC2014-TUPRI027 Fulltext: PDF; External link: Full-text at JACoW Server
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPRI027

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2024-06-18
07:49
Flat Bunches in the LHC / Shaposhnikova, Elena (CERN) ; Argyropoulos, Theodoros (CERN) ; Baudrenghien, Philippe (CERN) ; Esteban Müller, Juan (CERN) ; Mastoridis, Themis (CERN) ; Papotti, Giulia (CERN) ; Salvant, Benoit (CERN) ; Timko, Helga (CERN) ; Bhat, Chandra (Fermilab) ; Burov, Alexey (Fermilab)
A high-harmonic RF system that could serve multiple purposes was proposed for the LHC. Possible applications of the second harmonic RF system include beam stabilisation in the longitudinal plane in the absence of wide-band longitudinal feedback and reduction of bunch peak line-density. [...]
2014 - 3 p. - Published in : 10.18429/JACoW-IPAC2014-TUPME028 Fulltext: PDF; External link: Full-text at JACoW Server
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPME028

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2024-06-18
07:49
Novel Approaches in Characterization and Modelling of Fabrication Processes for SRF Components / Swieszek, Joanna (CERN ; U. Heidelberg (main)) ; Gallifa Terricabras, Adrià (CERN) ; Garlasché, Marco (CERN) ; Smakulska, Dorota (CERN)
In the past years, Finite Element Methods have been increasingly applied at CERN, with the aim of modelling fabrication processes for SRF components. Currently, many large deformation processes such as deep drawing, forging, hydroforming, and spinning, are being simulat-ed. [...]
2023 - 6 p. - Published in : JACoW SRF 2023 (2023) TUPTB038 Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.TUPTB038

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2024-06-18
07:49
Cryogenic Current Comparators as Low Intensity Diagnostics for Ion Beams / Sieber, Thomas (Darmstadt, GSI) ; Crescimbeni, Lorenzo (U. Jena (main) ; Darmstadt, GSI) ; Haider, David (Darmstadt, GSI) ; Marsic, Nicolas (Denmark, Tech. U.) ; Schmelz, Matthias ; Schmidl, Frank (U. Jena (main)) ; Schwickert, Marcus ; Stöhlker, Thomas (Helmholtz Inst., Jena ; Darmstadt, GSI) ; Stolz, Ronny (Ilmenau Tech. U.) ; Tan, Jocelyn (CERN) et al.
The Cryogenic Current Comparator (CCC) is a SQUID based superconducting device for intensity measurement, firstly proposed as a beam diagnostics instrument in the 90s at GSI. After prove of principle the CCC was introduced into other facilities, attesting great potential for high resolution measurements but at the same time considerable mechanical and cryogenics challenges and costs. [...]
2023 - 5 p. - Published in : JACoW IBIC 2023 (2023) TUP036 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.TUP036

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2024-06-18
07:49
Collimator Scan Based Beam Halo Measurements in LHC and HL-LHC / Hermes, Pascal (CERN) ; Giovannozzi, Massimo (CERN) ; Montanari, Carlo Emilio (CERN ; U. Manchester (main)) ; Morales Vigo, Sara (CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Rakic, Milica (Ecole Polytechnique, Lausanne) ; Redaelli, Stefano (CERN) ; Salvachúa, Belen (CERN)
Measurements in the CERN Large Hadron Collider (LHC) have indicated that the population of the transverse beam halo is greater than that of a Gaussian distribution. With the upcoming High Luminosity upgrade (HL-LHC), the stored beam energy in the beam halo could become large enough to threaten the integrity of the collimation system. [...]
2023 - 5 p. - Published in : JACoW IBIC 2023 (2023) 164-168 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.164-168

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2024-06-18
07:49
Crab Cavities for ILC / McIntosh, Peter (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Belomestnykh, Sergey (Fermilab) ; Burt, Graeme (Lancaster U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Calaga, Rama (CERN) ; De Silva, Subashini (Jefferson Lab ; Old Dominion U. (main)) ; Delayen, Jean (Old Dominion U. ; Jefferson Lab) ; Gonin, Ivan (Fermilab) ; Khabiboulline, Timergali (Fermilab) ; Lunin, Andrei (Fermilab) ; Okugi, Toshiyuki (KEK, Tsukuba) et al.
For the 14 mrad crossing angle proposed, crab cavity systems are fundamentally anticipated for the viable operation of the International Linear Collider (ILC), in order to maximise its luminosity performance. Since 2021, a specialist development team have been defining optimum crab cavity technologies which can fulfil the operational requirements for ILC, both for its baseline centre-of-mass energy of 250 GeV, but also extending those requirements out to higher beam collision intensities. [...]
FERMILAB-CONF-23-0863-SQMS-TD.- 2023 - 9 p. - Published in : JACoW SRF 2023 (2023) 990-998 Fermilab Library Server: PDF; Fulltext: PDF; External link: Fermilab Library Server
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.990-998

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2024-06-18
07:49
Characterisation of Cherenkov Diffraction Radiation Using Electro-Optical Methods / Schlögelhofer, Andreas (CERN ; TU Vienna) ; Duvillaret, Lionel (KAPTEOS) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Senes, Eugenio (CERN)
The properties of Cherenkov diffraction radiation (ChDR) have been studied extensively during the recent years to be exploited for non-invasive beam diagnostic devices for short bunches. The dependence of charge and the influence of the bunch form factor on the coherent part of the radiated spectrum have been demonstrated and studied in the past. [...]
2023 - 4 p. - Published in : JACoW IBIC 2023 (2023) TUP022 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.TUP022

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2024-06-18
07:49
Bunch-by-bunch Tune Shift Studies for LHC-type Beams in the CERN SPS / Mases Solé, Ingrid (CERN ; Goethe U., Frankfurt (main)) ; Bartosik, Hannes (CERN) ; Paraschou, Konstantinos (CERN) ; Schenk, Michael (CERN) ; Zannini, Carlo (CERN)
After the implementation of major upgrades as part of the LHC Injector Upgrade Project (LIU), the Super Proton Synchrotron (SPS) delivers high intensity bunch trains with 25 ns bunch spacing to the Large Hadron Collider (LHC). These beams are exposed to several collective effects in the SPS, such as beam coupling impedance, space charge and electron cloud, leading to relatively large bunch-by-bunch coherent and incoherent tune shifts. [...]
2024 - 5 p. - Published in : JACoW HB 2023 (2024) 194-198 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.194-198

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