# Accelerator Physics

2022-08-03
09:25
 Benchmark Between Measured and Simulated Radiation Level Data at the Mixed-Field CHARM Facility at CERN / Prelipcean, Daniel (CERN ; Munich, Tech. U.) ; Lerner, Giuseppe (CERN) ; Garcia Alia, Ruben (CERN) ; Bilko, Kacper (CERN) ; Infantino, Angelo (CERN) ; Di Francesca, Diego (CERN) ; Trummer, Julia (CERN) ; Ricci, Daniel (CERN) ; Brucoli, Matteo (CERN) ; Danzeca, Salvatore (CERN) A benchmark between various radiation monitors employed at CERN for radiation to electronics applications and their simulated values with the FLUKA Monte Carlo is performed at the CHARM mixed-field irradiation facility. Comparisons are made for different operational conditions, using data recorded in the 2015–2018 period.. 2022 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1557-1564 Fulltext: PDF;

2022-07-26
06:23
 FCC-ee Optics Design / Oide, Katsunobu (KEK, Tsukuba) 2017 - 7 p. - Published in : ICFA Beam Dyn. Newsl.: 72 (2017) , pp. 19-25 Fulltext: PDF;

2022-07-26
06:23
 HOM Mitigation for FCC-ee / Novokhatski, Alexander (SLAC) High electron and positron currents (1.5 A) are planned to be used in the Future Circular electron-positron Collider (FCC-ee) with a goal to archive high luminosity of order of 2.3 1036 cm-2s-2 at the Z-production collision at the beam energy of 45.6 GeV [1, 2]. Coherent effects at the high-current machine impose certain limitations on the magnitude of the impedance of the machine. [...] 2017 - 5 p. - Published in : ICFA Beam Dyn. Newsl.: 72 (2017) , no. 72, pp. 78-82 Fulltext: PDF;

2022-07-26
06:22
 Recommissioning of the CERN AD Stochastic Cooling System in 2021 after Long Shutdown 2 / Höfle, Wolfgang (CERN) ; Carli, Christian (CERN) ; Caspers, Fritz (CERN) ; Dupuy, Bruno (CERN) ; Gamba, Davide (CERN) ; Louwerse, Reinier (CERN) ; Myklebust, Vebjorn Roed (CERN) ; Oliveira, Joao Carlos (CERN) ; Ponce, Laurette (CERN) ; Rey, Stephane (CERN) et al. The power system of the Stochastic Cooling System of the anti-proton decelerator AD at CERN, installed on top of the shielding blocks of the AD ring, was completely dismantled during the long shutdown 2 (LS2) at the end of the 2018 run in order to gain access to the accelerator for magnet consolidation. At start-up, this required finding and verifying the correct delays for all 48 power amplifiers feeding to the two kickers by means of beam transfer functions for the two cooling plateaus at 3.57 GeV/c and 2 GeV/c. [...] 2021 - 6 p. - Published in : JACoW COOL 2021 (2021) 20-25 Fulltext: PDF; In : International Workshop on Beam Cooling and Related Topics (COOL 2021), Novosibirsk, Russian Federation, 1 - 5 Nov 2021, pp.20-25

2022-07-20
06:33
 New CERN SPS Beam Dump Imaging System / Burger, Stephane (CERN) ; Bravin, Enrico (CERN) ; Roncarolo, Federico (CERN) ; Topaloudis, Athanasios (CERN) ; Velotti, Francesco (CERN) ; Veyrunes, Eric (CERN) As part of the LHC injector Upgrade (LIU), the CERN SPS is now equipped with a new Beam Dumping System (SBDS) designed to cope with the high power beams foreseen for the High Luminosity LHC (HL-LHC) era. Before reaching the dump, the proton beam (from 26 to 450 GeV) is vertically kicked and then diluted passing through a series of horizontal and vertical bumps. [...] JACoW, 2021 - 5 p. - Published in : JACoW IBIC 2021 (2021) 254-258 Fulltext: PDF; In : 10th International Beam Instrumentation Conference (IBIC 2021), Online, Korea, 13 - 17 Sep 2021, pp.254-258

2022-07-14
16:49
 Prospects for beam-based study of dodecapole nonlinearities in the CERN High-Luminosity Large Hadron Collider / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Giovannozzi, Massimo (CERN) ; Tomas Garcia, Rogelio (CERN) Nonlinear magnetic errors in low-β insertions can have a significant impact on the beam-dynamics of a collider such as the CERN Large Hadron Collider (LHC) and its luminosity upgrade (HL-LHC). [...] CERN-ACC-NOTE-2022-0020. - 2022. - 34 p.

2022-07-14
04:12
 Mapping charge capture and acceleration in a plasma wakefield of a proton bunch using variable emittance electron beam injection / AWAKE Collaboration In the Phase 2 of the AWAKE first experimental run (from May to November 2018), an electron beam was used to probe and test proton-driven wakefield acceleration in a rubidium plasma column. [...] arXiv:2206.14075. - 5 p. Fulltext

2022-07-04
07:28
 Tackling transverse coherent instabilities of co- and counter rotating beams in the CERN Antiproton Accumulator / Pedersen, F CERN-PS-BR-83-016. - 1983. - 4 p.

2022-06-26
06:02
 Machine configuration and parameters / Solfaroli Camillocci, M (CERN) 2017 has been a remarkable year for the LHC with more than 50 $fb^{-1}$ delivered to ATLAS and CMS and the peak luminosity largely overtaking the design value. Moreover, quite some time was spent to increase operational knowledge with technics that will be extremely important in the future, such that RF detuning, levelling, ATS optics. 2018 will be also a very important year, as a challenging target will be set to accumulate as much data as possible before the LS2, while marking the road toward HL-LHC. [...] 2019 - 3 p. - Published in : (2019) , pp. 209-211 Fulltext: PDF; In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.209-211

2022-06-26
06:02
 Heavy Ions in 2018 / Schaumann, M (CERN) ; Jowett, J M (CERN) The last month of operation in 2018 will be devoted to lead-lead (Pb-Pb) physics, while no protons will be available from the injectors. In the history of the LHC this is only the 4th Pb-Pb run, but the initial 10 years LHC design goal of 1 nb $^{-1}$ of Pb-Pb luminosity in ALICE, ATLAS and CMS is already in reach. At this early stage, studies and discussions are still going on and it is not yet possible to decide all details of the run configuration. [...] 2019 - 5 p. - Published in : (2019) , pp. 197-201 Fulltext: PDF; In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.197-201