栅控脉冲行波管抑制束流波动的研究  

Beam-Ripple Restraining in Pulsed Grid-Controlled Traveling Wave Tube

作　　者：亢飞[1,2] 肖刘[3] 李飞[3] 曹林林[3] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100039 [3]中国科学院电子学研究所空间行波管研发中心,北京100190

出　　处：《真空科学与技术学报》2014年第12期1321-1328,共8页Chinese Journal of Vacuum Science and Technology

摘　　要：对脉冲栅控行波管来说抑制束流的波动尤为重要。本文使用MTSS分析了栅网参数和阳极参数对电子注参数的影响,设计了性能良好的脉冲栅控行波管电子枪。为了保证由电子枪提供的电子注能够较平稳地通过互作用区,通过Maxwell2D设计了带开口磁钢的周期永磁聚焦系统,分析了等幅、增幅和幅值无规则变化三种过渡区磁场电子注波动分别随磁场起始位置的变化。结果表明采用增幅过渡区,通过优化磁场增幅以及磁场起始位置,能够有效地减小电子注波动,降低外层电子的离散,改善栅网的透镜效应带来的层流性差的问题。The electron gun and periodic permanem magnetic focusing system with open magnetic tings of the pulsed #d-controlled traveling wave tube （TWT） was modeled and simulated with software packages MTSS and Maxwell 2D for their design optimization. The impact of the grid and anode on the characteristics of the electron beam was investigated; the dependence of the beam ripples on the magnetic field distributions, especially the 1st peak positions （or the start-position） in the areas of uniform transition, gradual transition, and rule-less transition, was evaluated. The simulated results show that the design optimization effectively restrains the beam tipples, reduces scattering of marginal electrons, and im- proves the grid-induced laminatity. To be specific, the design included the optimized amplitude-incremem and start-posi- tion of the magnetic field with finite discrepancy in the gradual transition area.

关 键 词：栅控脉冲行波管 电子枪 周期永磁聚焦系统 电子注波动 

分 类 号：TN124[电子电信—物理电子学]