带状注速调管注波互作用及其计算程序的研究

Beam-wave interaction and simulation program for sheet beam klystron

针对带状注速调管中采用非轴对称性大宽高比带状电子注的特点,建立了2.5维窄带宏粒子模型,编写了注波互作用模拟分析程序.以一支百兆瓦级带状注速调管模拟设计为例,对程序的计算能力和效果进行了检验,结果与三维PIC软件有较好的可比性,且计算效率有很大幅度提升,适用于带状注速调管注波互作用系统的初步设计和参数优化过程.

In this paper,a 2.5-dimensional macro-particle model is proposed for a nonaxisymmetrical and large width-height ratio sheet beam klystron（SBK） and a corresponding beam-wave interaction program is developed.An X-band 100-MW SBK is simulated for testing the computing capability of the program.The results are in good agreement with those from 3D PIC software,and the computation time can greatly be reduced,which is useful for the initial design and the optimization of the SBK beam-wave interaction structure.