摘要
A particle-in-cell Monte Carlo collision model of a discharge chamber is established to investigate the start-up process of a miniature ion thruster.We present the discharge characteristics at different stages(the initial stage,development stage,and stable stage)according to the trend of the discharge current with time.The discharge current is the sum of the sidewall current and the backplate current.During the start-up process,the sidewall current lags behind the backplate current.The variation and distribution characteristics of the discharge current over time are determined by the electron density distribution and electric potential distribution.
作者
杨鑫勇
魏立秋
蒋文嘉
纪添源
周立伟
李鸿
丁永杰
唐井峰
郭宁
于达仁
Xinyong YANG;Liqiu WEI;Wenjia JIANG;Tianyuan JI;Liwei ZHOU;Hong LI;Yongjie DING;Jingfeng TANG;Ning GUO;Daren YU(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,People's Republic of China;Key Laboratory of Aerospace Plasma Propulsion,Ministry of Industry and Information Technology,Harbin 150001,People's Republic of China;Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,People's Republic of China)