阳极层霍尔推力器的阳极分段形式对束流分布的影响  

Effect of Anode Segmented Form on Ion Beam Distribution of Anode Layer Hall Thruster

作　　者：赵杰[1,2] 唐德礼[1] 李平川[1] 耿少飞[1] ZHAO Jie;TANG De-li;LI Ping-chuan;GENG Shao-fei(Southwestern Institute of Physics,Chengdu 610041,China;The Engineering and Technical College of Chengdu University of Technology,Les han 614007,China)

机构地区：[1]核工业西南物理研究院,四川成都610041 [2]成都理工大学工程技术学院,四川乐山614007

出　　处：《真空》2019年第4期1-5,共5页Vacuum

基　　金：国家自然科学基金(11775073);四川省科技厅项目(2019YJ0705)

摘　　要：由于圆柱形阳极层霍尔推力器的阳极分段形式会影响到推力器内电势的分布,进而影响到推力器内放电等离子体中电子的运动形式和工质的电离率。本文主要从实验和仿真模拟两个方面来分析不同的阳极分段形式(单段阳极、两分段阳极、三分段阳极和四分段阳极)在同样的工作条件下,对离子束流分布的影响。通过结果分析来指导阳极的结构设计。由结果可知两分段阳极时的离子束电流和离子束能量较高。在束流直径35mm内的四种阳极分段形式下的束流电流分布有一定的差别,其他位置基本相同。900V的放电电压下,两分段阳极下的束流能量分布比三分段阳极的整体上均高32e V左右,比单阳极和四分段阳极高20e V左右(除去中轴线和边沿附近)。此研究结果对圆柱形阳极层霍尔推力器的阳极设计提供了可靠的理论依据。The anode segmented form of the cylindrical anode layer Hall thruster will affect the distribution of the potential in the thruster,and thus the motion of electrons and the ionization rate of propellants in discharge plasma of thrusters are affected.In this paper,the effects of different anode segments(single anode,two segmented anodes,three segmented anodes and four segmented anodes)on ion beam distribution were analyzed from two aspects of experiment and simulation.The results were analyzed to guide the structural design of the anode.The results show that the ion current and ion beam energy of the two segmented anodes are higher.There are some differences in the beam current distribution of the four segmented anodes within the beam diameter of 35 mm,and the other positions are basically the same.When the discharge voltage is 900 V,the beam energy distribution under the two segmented anodes is about 32 eV higher than that on the three segmented anodes as a whole and20 eV higher than that of the single anode and the four segmented anodes(excluding the central axis and the edge).The research results provide a reliable theoretical basis for the anode design of cylindrical anode layer Hall thruster.

关 键 词：等离子体 阳极层霍尔推力器 束流能量 PIC模拟 分段阳极 

分 类 号：O462.5[理学—电子物理学] O532.11[理学—物理]