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SPS and CNGS

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2020-05-28
16:03
I/Q Model of the SPS 200 MHz Travelling Wave Cavity and Feedforward Design / Baudrenghien, Philippe (CERN) ; Mastoridis, Themistoklis (California Polytechnic State Univ. (US))
As part of the LHC injector upgrade project (LIU), that calls for the doubling of the bunch intensity injected from the SPS into the LHC, the SPS Low Level RF (LLRF) is fully upgraded during the LHC Long-Shutdown 2 (LS2) [...]
CERN-ACC-NOTE-2020-0032. - 2020. - 22 p.
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2020-05-18
12:47
RF multipoles deliverable / Cruz Alaniz, Emilia (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The crab cavities to be installed in the High-Luminosity LHC (HL-LHC) aim to provide an increase in luminosity by restoring head-on collisions and therefore reducing the loss of luminosity due to the crossing angle. [...]
CERN-ACC-NOTE-2020-0031. - 2020. - 17 p.

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2020-05-13
07:06
Helical beam screen for the Future Circular Collider for hadrons injection kicker magnets / Chmielińska, A (CERN ; Ecole Polytechnique, Lausanne) ; Barnes, M J (CERN)
The Future Circular Collider for hadrons (FCC-hh) is the proposed high-energy frontier particle collider, which is expected to enable proton-proton collisions at a center-of-mass energy of 100 TeV. The specifications for the FCC-hh injection kicker system are very challenging. [...]
2020 - 20 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 041002 Fulltext from Publisher: PDF;

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2020-05-13
05:17
Intra-bunch feedback system developments at DAFNE / Drago, Alessandro (LNF, Dafne Light ; Rome U., Tor Vergata) ; Alesini, D. (LNF, Dafne Light) ; Caschera, S. (LNF, Dafne Light) ; Gallo, A. (LNF, Dafne Light) ; Fox, J.D. (SLAC) ; Cesaratto, J. (SLAC) ; Dusatko, J. (SLAC) ; Olsen, J. (SLAC) ; Rivetta, C. (SLAC) ; Turgut, O. (SLAC) et al.
This paper presents history and evolution of the intra-bunch feedback system for circular accelerators. [...]
arXiv:2004.11649. - 6 p.
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2020-04-28
08:58
Development and Beam Irradiation of Ir/W/Ta/Ta-Alloys Refractory Metals and Cladding Via Hot Isostatic Pressing at CERN for Beam Intercepting Devices Applications / Busom Descarrega, Josep (CERN) ; Torregrosa, Claudio (CERN) ; Calviani, Marco (CERN)
The current contribution details the research and development activities associated to refractory metals such as iridium, tungsten, tantalum and tantalum-tungsten alloys executed at CERN in the framework of the development of beam intercepting devices, including beam irradiation tests both at the HiRadMat Facility as well as in the North Area Target Complex..
2020 - 9 p. - Published in : JPS Conf. Proc. 28 (2020) 041002 Fulltext: PDF;
In : 14th International Workshop on Spallation Materials Technology, Fukushima, Japan, 11 - 17 Nov 2018, pp.041002

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2020-04-27
10:58
Performance validation of the upgraded PSB Transfer Kicker BT2.KFA20 / Coralejo Feliciano, Luis Miguel (CERN) ; Sermeus, Luc (CERN)
In the framework of the LHC Injector Upgrade (LIU) project [1], the CERN PSB Transfer Kicker KFA20 pulse power generator has been modified, as done for the Transfer Kicker KFA10 pulse power generator, in order to be compatible with the extraction kinetic energy increase of the PSB from 1.4 to 2.0 GeV. [...]
CERN-ACC-NOTE-2020-0027. - 2020. - 3 p.
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2020-04-26
06:50
Results from the CERN LINAC4 Longitudinal Bunch Shape Monitor / Tan, Jocelyn (CERN) ; Bellodi, Giulia (CERN) ; Feschenko, Alexander (Moscow, INR) ; Gavrilov, Sergei (Moscow, INR)
The CERN Linac4 has been successfully commissioned to its nominal energy and will provide 160 MeV H⁻ ions for charge-exchange injection into the Proton Synchrotron Booster (PSB) from 2020. A complete set of beam diagnostic devices has been installed along the accelerating structures and the transfer line for safe and efficient operation. [...]
JACoW, 2019 - 5 p. - Published in : 10.18429/JACoW-IBIC2018-WEPA19 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.WEPA19

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2020-04-26
06:50
The Installation and Commissioning of the AWAKE Stripline BPM / Liu, Shengli (TRIUMF) ; Dirksen, Paul (TRIUMF) ; Gessner, Spencer (CERN) ; Guillot-Vignot, Franck (CERN) ; Medina, David (CERN) ; Søby, Lars (CERN) ; Verzilov, Victor (TRIUMF)
AWAKE (The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN) stripline BPMs are required to measure the position of the single electron bunch to a position resolution of less than 10 µm rms for electron charge of 100 pC to 1 nC. This paper describes the design, installation and commissioning of a such BPM system developed by TRIUMF (Canada). [...]
JACoW, 2019 - 4 p. - Published in : 10.18429/JACoW-IBIC2018-TUPB01 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUPB01

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2020-04-26
06:50
Adaptive Collimator Design for Future Particle Accelerators / Furness, Thomas (Huddersfield U.) ; Bertarelli, Alessandro (CERN) ; Carra, Federico (CERN) ; Fletcher, Simon (Huddersfield U.) ; Gentini, Luca (CERN) ; Pasquali, Michele (CERN) ; Redaelli, Stefano (CERN) ; Williamson, James (Huddersfield U.)
The function of collimators in the LHC is to control and safely dispose of the halo particles that are produced by unavoidable beam losses from the circulating beam. Even tiny proportions of the 7TeV beam have the stored energy to quench the superconducting magnets or damage parts of the accelerator if left unchecked. [...]
JACoW, 2019 - 5 p. - Published in : 10.18429/JACoW-IBIC2018-TUPA15 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUPA15

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2020-04-26
06:50
Beam Intensity Monitoring with nA Resolution - the Cryogenic Current Comparator (CCC) / Haider, David (Darmstadt, GSI) ; De Gersem, Herbert (Darmstadt, Tech. Hochsch.) ; Fernandes, Miguel (CERN) ; Forck, Peter (Darmstadt, GSI) ; Golm, Jessica (Unlisted, DE) ; Kurian, Febin (Darmstadt, GSI) ; Marsic, Nicolas (Darmstadt, Tech. Hochsch.) ; Schmelz, Matthias (Inst. Photonic Tech., Jena) ; Schmidl, Frank (Unlisted, DE) ; Schwickert, Marcus (Darmstadt, GSI) et al.
The storage of low current beams as well as the long extraction times from the synchrotrons at FAIR require non-destructive beam intensity monitoring with a current resolution of nanoampere. To fulfill this requirement, the concept of the Cryogenic Current Comparator (CCC), based on the low temperature SQUID, is used to obtain an extremely sensitive beam current transformer. [...]
JACoW, 2019 - 4 p. - Published in : 10.18429/JACoW-IBIC2018-MOPC08 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.MOPC08

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