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.
出处
《高能物理与核物理》
CSCD
北大核心
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
