原子氧环境对空心阴极影响的地面模拟试验研究  

Ground experiment for influence of atomic oxygen environment on hollow cathode

作　　者：冯杰[1] 刘明正[1] 王彦龙[1] 陈新伟 王蒙[1] 杨俊泰 田立成[1] FENG Jie;LIU Mingzheng;WANG Yanlong;CHEN Xinwei;WANG Meng;YANG Juntai;TIAN Licheng(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,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

出　　处：《航天器环境工程》2018年第3期241-246,共6页Spacecraft Environment Engineering

摘　　要：为确定原子氧对六硼化镧型空心阴极的影响,将LHC-5型空心阴极放置于原子氧试验设备中反复点火,期间使用钨铼5-26热电偶测量阴极管温度。试验完成后检查空心阴极,发现阴极管出现膨胀开裂现象,其断面的XPS成分分析结果表明阴极管的断裂失效是由氧化导致的。因此,针对LEO使用六硼化镧型空心阴极的离子推力器、霍尔推力器和等离子体接触器等航天器部件,应制定正确的工作关机策略以保证阴极不受原子氧环境影响。To study the influence of atomic oxygen on the LaB6 hallow cathode, the LHC-5 hollow cathode is placed in the atomic oxygen test facility with repeated ignitions, and with the tungsten-rhenium 5-26 thermocouple to measure the temperature of the cathode tube. After the test, the hollow cathode is inspected, and the cathode tube appears to be expanded and cracked. The XPS analysis of the cross section shows that the failure of the cathode tube is caused by oxidation. Therefore, protective measures should be taken for LHC-5-type hollow cathode ion thrusters, the Hall thrusters and the plasma contactors in LEO under atomic oxygen attack,and a correct shutdown strategy is essential for ensuring the normal work of the cathode.

关 键 词：空心阴极 阴极管 氧化 低地球轨道 X射线光电子能谱 

分 类 号：O462.5[理学—电子物理学] V416.5[理学—物理]