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Collective effects for long bunches in dual harmonic RF systems
An, SZ; Bongardt, K; Maier, R; Tang, JY; Zhang, TJ; Tang JY(唐靖宇)
2008
发表期刊CHINESE PHYSICS C
卷号32期号:2页码:#REF!
通讯作者An, SZ (reprint author), China Inst Atom Energy, Beijing 102413, Peoples R China.
摘要The storage of,long bunches for large time intervals needs flattened stationary buckets with a large bucket height. Collective effects from the space charge and resistive impedance are studied by looking at the incoherent particle motion for the matched and mismatched bunches. Increasing the RF amplitude with particle number provides r.m.s wise matching for modest intensities. The incoherent motion of large amplitude particles depends on the details of the RF system. The resulting debunching process is a combination of the too small full RF acceptance together with the mismatch, enhanced by the collective effects. Irregular single particle motion is not associated with the coherent dipole instability. For the stationary phase space distribution of the Hofmann-Pedersen approach and for the dual harmonic RF system, stability limits are presented, which are too low if using realistic input distributions. For single and dual harmonic RF system with d=0.31, the tracking results are shown for intensities, by a factor of 3 above the threshold values. Small resistive impedances lead to coherent oscillations around the equilibrium phase value, as energy loss by resistive impedance is compensated by the energy gain of the RF system.
文章类型Article
关键词resistive impedance incoherent motion halo formation coherent dipole instability
学科领域Physics
收录类别SCI
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000253607100013
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226443
专题加速器中心
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GB/T 7714
An, SZ,Bongardt, K,Maier, R,et al. Collective effects for long bunches in dual harmonic RF systems[J]. CHINESE PHYSICS C,2008,32(2):#REF!.
APA An, SZ,Bongardt, K,Maier, R,Tang, JY,Zhang, TJ,&唐靖宇.(2008).Collective effects for long bunches in dual harmonic RF systems.CHINESE PHYSICS C,32(2),#REF!.
MLA An, SZ,et al."Collective effects for long bunches in dual harmonic RF systems".CHINESE PHYSICS C 32.2(2008):#REF!.
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