电子直线加速器束流动力学的三维理论和计算

THREE-DIMENSIONAL THEORY AND COMPUTATION OF BEAM DYNAMICS IN AN ELECTRON LINAC

本文提出了电子直线加速器束流动力学计算的三维理论。将注入的脉冲束流划分为等电荷的环,追踪这些环在三维几何空间的运动,并在六维相空间内讨论束流的性能,给出束流在(r,p_r),(rθ,p_θ),(z,p_Z)三个相平面上的图象以及均方根发射度的数值。本文还介绍了应用三维理论的实例计算结果,并对影响径向发射度的因素作了讨论。

A three - dimensional theory of beam dynamics in an electron linac is presented in the paper. The injected pulse beam is divided into many annuluses with the same charge amount and the motions of the annuluses are traced in a 3-D space. The characteristics of the beam is studied in 6-D phase space. The emittance feature and RMS emittance of the bunch in the phase plane (r, pr), (rθ,pa) (z, p.) are given, and the facts which affect the beam emittance are discussed.