直线加速器中的非线性空间电荷效应和发射度增长  

Nonlinear Space Charge Effects and Emittance Growth in Linac

作　　者：陈银宝[1] 黄志斌[1] 

机构地区：[1]中国原子能研究院,北京102413

出　　处：《高能物理与核物理》1999年第12期1231-1242,共12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：直线加速器中束团的非线性空间电荷效应是引起发射度增长的重要原因之一．根据计算在屏蔽筒中非均匀分布京团的空间电荷效应的普遍方法，推导了直线加速器圆波导中几种非均匀分布束团的非线性场能公式，并给出数值计算结果．讨论了由非线性所引起发射度增长．The nonlinear space charge effect of bunched beam in linac is one of theimportant reasons that induce the emittance growth. The general formulas forcalculating the potential of space charge with nonuniform distribuhon in surmundingstructure are presented. For a bunched beam with different distribuhon in waveguideof linac, the expresses of the nonlinear field energy of a cylinder model of spacecharge are derived, and the numerical results of the nonlinear field energy for differentdensity distributions are given. The emittance growthes caused by these nonuniformitiesare discussed.

关 键 词：直线加速器 非线性空间 电荷效应 发射度增长 

分 类 号：TL53[核科学技术—核技术及应用]