行波管电子枪改进及过渡区磁场设计的模拟计算  

Simulation of Improving Electron Gun and Designing PPM of Transition Region for TWT

作　　者：马亚林[1] 陈建新[2] 

机构地区：[1]江苏淮阴工学院数理学院,淮安223001 [2]南通大学电子信息学院微波通信研究所,南通226019

出　　处：《微波学报》2011年第5期44-49,共6页Journal of Microwaves

摘　　要：分析了行波管电子枪和过渡区磁场设计的基本原理和方法,结合互作用区分别对高面积压缩比、低导流系数电子枪及其后的过渡区磁场进行改进和设计:首先对加辅助阳极的原电子枪和过渡区的周期聚焦磁场进行优化,在考虑热初速的情况下,对电子枪和磁场再度优化。模拟结果表明:辅助阳极能有效改善高面积压缩比、低导流系数电子枪产生电子注的层流性;电子热初速对电子注质量影响较大;合理的过渡区磁场能为互作用区提供符合要求的电子注。运用此设计对一螺旋线行波管进行模拟计算,达到了良好的效果。The basic principles and methods of designing electron gun and PPM of the transition region for TWT were analyzed.The original electron gun with an assistant anode and PPM of the transition region were optimized.In the case of the thermal initial velocity effects,the electron gun and PPM were optimized once again.The simulation results show that the laminarity of the electron beam can be improved greatly by attaching an assistant anode,the quality of the electron beam is influenced by the thermal initial velocity effects.The reasonable PPM of the transition region can provide a wanted electron injection in the interaction area.Simulation of a TWT with this design gave good results.

关 键 词：辅助阳极 过渡区周期聚焦磁场 电子热初速 增益 截获电流 模拟计算 

分 类 号：TN124[电子电信—物理电子学]