均匀聚焦系统和周期性聚焦系统中束晕形成的模拟研究  

Simulation of Halo Formation in Breathing Round Beams in a Uniform or Periodic Focusing Channel

作　　者：黄志斌[1] 陈银宝[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《高能物理与核物理》1998年第10期943-950,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;核工业科学基金

摘　　要：首先采用束核－试验粒子模型，利用Ｐｏｉｎｃａｒｅ截面法，讨论了均匀聚集系统和周期性聚集系统中，由强流带电粒子的自场效应所导致的非线性共振及混沌现象．然后按照自治理论，进一步对相空间中的初始粒子分布分别满足水袋型、抛物线型以及高斯型等相空间分布情况下进行了模拟计算，并得到了一系列结果诸如束晕强度、发射度增长随失配因子及调谐衰减变化等．It is shown that beam self-field effects induce nonlinear resonances and chaotic behavior in uniform or periodic focusing channel by means of particle-core model and Poincare mapping technique. In order to explore self-consistently the fundamental properties of breathing round beams propagating in a uniform channel, the initial phase-space distribution of a beam injected into a linac is adopted to be a sufficiently realistic distribution such as Gaussian, waterbag and parabolic distribution Multiparticle simulations are performed and a series of results such as halo intensity and emittance growth are obtained.

关 键 词：相空间分布 束晕强度 聚焦系统 直线加速器 

分 类 号：TL53[核科学技术—核技术及应用]