利用电子注测量分析系统研究Ka波段空间行波管用双阳极电子枪性能  

Evaluation of Dual-Anode Electron-Gun for Ka-Band Space TWT with Lab-Built Electron Beam Analyzer

作　　者：相东[1,2,3] 李现霞[1] 黄明光[1] 李文秋[1,2] 陈喜艳[1,2] 

机构地区：[1]中国科学院电子学研究所空间行波管研究发展中心,北京100190 [2]中国科学院大学,北京100049 [3]北京航天微机电技术研究所,北京100094

出　　处：《真空科学与技术学报》2016年第11期1226-1233,共8页Chinese Journal of Vacuum Science and Technology

摘　　要：空间行波管的性能很大程度上依赖于电子枪的电子注,为获得实际的电子枪电子注分布参数,优化行波管电子光学系统,本文采用电子注测量分析系统对Ka波段空间行波管用双阳极电子枪进行了测量与分析实验,分别对该电子枪电子注导流系数、截面电流密度、射程、注腰半径以及发射度等参数随聚焦极偏压、灯丝热子功率的变化进行了仔细分析。将测试数据与制管实测结果以及MTSS软件优化设计结果进行比较,获得了较好的一致性。结果表明,电子注测量与分析数据对行波管实际制管与调试提供了良好的参考依据。The behavior of dual-anode electron gun for Ka-band space travelling wave tube（ TWT） was mathematically modeled,theoretically analyzed,experimentally measured with the lab-built Electron Beam Analyzer,and numerically simulated with the newly-developed software package Microwave Tube Simulator Suite（ MTSS）,to optimize the performance of the TWT ＇s electron optics. The influenceof the voltage of the beam forming electrode（ BFE） and heating power on the electron gun＇s properties,including but not limited to the perveance,radial distribution of current density,emittance,electron trajectories and beam-waist radius,was systematically investigated. The experimental data,measured with the novel electron beam analyzer and evaluated in the electron gun fabrication,respectively,were found to be in good agreement with the simulated results. We suggest that the diagnosis of electron gun properties with the newly-developed electron beam analyzer be of much technological interest in design optimization of electron optics in TWT.

关 键 词：电子注测量分析系统 行波管 Ka-波段 双阳极电子枪 聚焦极偏压 热子功率 

分 类 号：TN124[电子电信—物理电子学]