Instability studies at the CERN Proton Synchrotron during transition crossing

doi:10.1103/PhysRevAccelBeams.21.120101

	Instability studies at the CERN Proton Synchrotron during transition crossing
	Wang, N.; Sterbini, G.; Métral, E.; Huschauer, A.; Koukovini-Platia, E.; Aumon, S.; Migliorati, M.; Migliorati, M; Aumon, S; Koukovini-Platia, E
刊名	PHYSICAL REVIEW ACCELERATORS AND BEAMS
	2018
卷号	21 期号:12 页码:120101
ISSN号	2469-9888
DOI	10.1103/PhysRevAccelBeams.21.120101
文献子类	Article
英文摘要	The 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.
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000452963500001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286910]
专题	高能物理研究所_加速器中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, N.,Sterbini, G.,Métral, E.,et al. Instability studies at the CERN Proton Synchrotron during transition crossing[J]. PHYSICAL REVIEW ACCELERATORS AND BEAMS,2018,21(12):120101.
APA	Wang, N..,Sterbini, G..,Métral, E..,Huschauer, A..,Koukovini-Platia, E..,...&王娜.(2018).Instability studies at the CERN Proton Synchrotron during transition crossing.PHYSICAL REVIEW ACCELERATORS AND BEAMS,21(12),120101.
MLA	Wang, N.,et al."Instability studies at the CERN Proton Synchrotron during transition crossing".PHYSICAL REVIEW ACCELERATORS AND BEAMS 21.12(2018):120101.