周期性聚焦系统中束晕形成的模拟研究  

HALO FORMATION IN BREATHING ROUND BEAMS IN A 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电物理和激光研究所,北京102413

出　　处：《原子能科学技术》1999年第5期385-391,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金;核工业科学基金

摘　　要：运用PIC（Particle－In－Cell）多粒子模拟方法，讨论了周期性聚焦系统中束晕形成的机制。为了真实、自洽地描述束晕的形成，假定相空间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。通过数值模拟计算，得到了束晕强度、发射度增长随失配因子及调谐衰减变化等一系列结果。Halo formation in high-intensity axisymmetric beams in a periodic focusing channel is analyzed using particle-in-cell simulations. In order to explore self-consistently the fundamental properties of breathing round beams propagating in a periodic focusing channel, the initial phasespace distribution of a beam injected into a linac is adopted to be some sufficiently realistic distributions such as Gaussian, waterbag and parabolic. Numerical results such as halo intensity and emittance growth are obtained by means of multiparicle simulations.

关 键 词：相空间分布 束晕强度 直线加速器 聚焦系统 

分 类 号：TL530.2[核科学技术—核技术及应用]