栅控热阴极中和器数值仿真改进与试验研究  

Numerical Simulation and Experimental Research on Grid Controlled Thermal Cathode Neutralizer

作　　者：贺亚强 郭宁[1] 谷增杰 李兴达[1] 祁康成 HE Yaqiang;GUO Ning;GU Zengjie;LI Xingda;QI Kangcheng(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China;School of Optoelectronics Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000 [2]电子科技大学光电科学与工程学院,成都610054

出　　处：《真空与低温》2021年第6期608-614,共7页Vacuum and Cryogenics

基　　金：甘肃省科技计划项目(18JR3RA412)。

摘　　要：利用Opera仿真软件开展了栅控热阴极中和器性能的仿真研究,结果显示,阳极电流和栅极截获电流与阴极-阳极间距、阴极-栅极间距、栅极电压、栅极孔半径相关。对设计的栅控热阴极中和器进行的性能测试试验结果表明,当阴极-阳极间距在5~30L0,阴极-栅极间距在D0~2D0,栅极孔半径在6~8r0时,栅控热阴极中和器电子发射性能存在最佳点;当栅极电压100 V、阳极电压300 V时,阳极电流达到17.74 mA,栅极截获电流仅为0.03 mA,阴极加热功率为8 W。仿真结果与试验结果一致性较好。In order to study the optimal design method of the grid controlled thermal cathode neutralizer,the Opera simulation software was used to carry out the simulation evaluation of the grid controlled thermal cathode neutralizer,and the designed grid controlled thermal cathode neutralizer was carried out performance test.The research results show that the simulation results are in good agreement with the experimental results,and the anode current are related to the cathodeanode spacing,cathode-grid spacing,grid voltage,and grid hole radius.When the cathode-anode spacing is 5~30L0,the cathode-grid spacing is D0~2D0,and the grid hole radius is 6~8r0,the electron emission performance of the grid-controlled thermal cathode neutralizer has an optimal point.When the grid voltage is 100 V and the anode voltage is 300 V,the anode current reaches 17.74 mA,the grid intercept current is only 0.03 mA,and the cathode heating power is 8W.

关 键 词：微电推进 中和器热阴极 建模仿真 性能试验 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]