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Instability studies at the CERN Proton Synchrotron during transition crossing
Migliorati, M.; Aumon, S.; Koukovini-Platia, E.; Huschauer, A.; Métral, E.; Sterbini, G.; Wang, N.; Migliorati, M; Aumon, S; Koukovini-Platia, E; Huschauer, A; Metral, E; Sterbini, G; Wang, N; 王娜(加)
AbstractThe CERN Proton Synchrotron (PS) routinely crosses transition energy at around 6 GeV in order to accelerate protons that are injected in the Super Proton Synchrotron (SPS) or transferred to users of fixed target experiments. Depending on the beam parameters and intensity, a fast vertical coherent instability occurs during transition crossing. The instability, characterized by beam losses and a frequency spectrum in the range of 500-900 MHz, represents an important intensity limitation for the neutron time-of-flight (nTOF) beam, and in general could represent a bottleneck for future high intensity beams. In order to better understand the nature and the source of the instability and to find possible mitigations, a dedicated measurement campaign took place. Parallel to the measurements, beam dynamics simulations have been performed to study the observed instability. In particular, single bunch effects have been simulated using the PS transverse beam coupling impedance model developed over recent years. In this paper we present the measurements results along with the obtained instability thresholds. Different beam configurations and stabilizing effects, such as the gamma jump scheme and the octupole-induced tune spread, are also considered. The measurements results are compared with simulations.
Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Nuclear ; Physics, Particles & Fields
WOS IDWOS:000452963500001
ADS Bibcode2018PhRvS..21l0101M
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:7 [ADS]
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Migliorati, M.,Aumon, S.,Koukovini-Platia, E.,et al. Instability studies at the CERN Proton Synchrotron during transition crossing[J]. PHYSICAL REVIEW ACCELERATORS AND BEAMS,2018,21(12):120101.
APA Migliorati, M..,Aumon, S..,Koukovini-Platia, E..,Huschauer, A..,Métral, E..,...&王娜.(2018).Instability studies at the CERN Proton Synchrotron during transition crossing.PHYSICAL REVIEW ACCELERATORS AND BEAMS,21(12),120101.
MLA Migliorati, M.,et al."Instability studies at the CERN Proton Synchrotron during transition crossing".PHYSICAL REVIEW ACCELERATORS AND BEAMS 21.12(2018):120101.
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