栅控热阴极中和器电子发射特性的仿真分析  

Simulation Analysis on Electron Emission Characteristics of Grid Controlled Thermal Cathode

作　　者：贺亚强 郭宁[1] 谷增杰 祁康成 HE Yaqiang;GUO Ning;GU Zengjie;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2期192-198,共7页Vacuum and Cryogenics

基　　金：国家自然科学基金(11702123)。

摘　　要：栅控热阴极中和器不消耗推进剂,可以简化微电推进供气供电系统、降低整个系统的复杂性,并提高推力器的比冲。为了研究中和器结构尺寸和工况参数对电子发射性能的影响规律,采用Opera仿真软件对中和器建模,分析主要设计参数对阳极电流、栅极截获电流和电子束轨迹的影响。分析结果表明,采用合理的设计参数可以引出24.6 mA的阳极电流,栅极截获电流为0 mA,能够满足微小电推力器对中和器的需求。仿真分析结果也为后续试验验证提供了依据。The neutralizer based on the grid-controlled thermal cathode does not consume propellant,which can simplify the micro-electric propulsion gas supply and power supply system,reduce the complexity of the entire system,and increase the specific impulse of the thruster.In order to study the influence of the structure size and operating parameters of the neutralizer on the electron emission performance,the Opera simulation software was used to model the neutralizer,and the influence of the main design parameters on the anode current,grid intercept current and electron beam trajectory was analyzed.The analysis shows that the anode current of 24.6 mA can be drawn with reasonable design parameters,and the intercepted current of the grid is 0 mA,which can meet the needs of the micro electric thruster for the neutralizer.The simulation analysis results for the optimization of the structural size design of the neutralizer also provide a basis for subsequent test verification.

关 键 词：微电推进 中和器 热阴极 栅极设计 建模仿真 

分 类 号：V445[航空宇航科学与技术—飞行器设计]