An equivalent model of discharge instability in the discharge chamber of Kaufman ion thruster  

作　　者：Feng TIAN Kan XIE Long MIAO Fuwen LIANG Jiahui SONG Song BAI Ningfei WANG 田丰;谢侃;苗龙;梁福文;宋家辉;白松;王宁飞(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,People’s Republic of China)

机构地区：[1]School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,People’s Republic of China

出　　处：《Plasma Science and Technology》2022年第11期126-134,共9页等离子体科学和技术（英文版）

基　　金：the financial support from National Natural Science Foundation of China(Nos.11402025,11475019,and 11702123);the National Key Laboratory of Science and Technology on Vacuum Technology&Physics(No.ZWK1608);the Advanced Space Propulsion Laboratory of BICE;Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology(No.Lab ASP-2018-03)。

摘　　要：The industrial application of the Kaufman ion thruster in its arc stage is limited owing to the instability of the discharge pulse.Presently,a complete prediction model that can predict the discharge pulse in the high-current stage does not exist.In this study,a complete prediction model for the pulse in the ion thruster is established using the zero-dimensional plasma discharge model and equivalent circuit model.The zero-dimensional plasma discharge model is used to obtain the corresponding plasma parameters by calculating the beam current,discharge current,voltage,and gas flow under actual working conditions.The input parameters of the equivalent circuit model are calculated using empirical formulae to acquire the estimated discharge waveforms.The pulse waveforms obtained using the model are found to be consistent with the experimental results.The model is used to evaluate the process of rapid changes in plasma density.Additionally,this model is employed to predict changes in the pulse waveforms when the volume of the discharge chamber and grid plate transmittance are changed.

关 键 词：Kaufman ion thruster arc discharge pulse phenomenon zero-dimensional plasma discharge model equivalent circuit model 

分 类 号：V439.1[航空宇航科学与技术—航空宇航推进理论与工程]