两种会切场离子推力器对比研究  

Comparative Study of Two Types of Cusp Field Ion Thruster

作　　者：赵以德[1] 李建鹏 张天平[1] 江豪成[1] 王亮[1] 郭德洲 杨威[1] ZHAO Yi-de;LI Jian-peng;ZHANG Tian-ping;JIANG Hao-cheng;WANG Liang;GUO De-zhou;YANG Wei(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,甘肃兰州730000

出　　处：《推进技术》2021年第11期2633-2640,共8页Journal of Propulsion Technology

基　　金：甘肃省杰出青年基金(21JR7RA744);真空技术与物理重点实验室基金(ZWK1703)。

摘　　要：为了进一步提升离子推力器性能和可靠性,基于30cm环形会切场离子推力器LIPS-300H和30cm柱形会切场离子推力器LIPS-300Z,对比研究了两类会切场离子推力器各自优劣及其机理。首先分析了两种会切场原理,总结给出了两种会切场差异,然后实验对比研究了两种会切场离子推力器束流均匀性、放电效率和寿命。实验结果显示,LIPS-300H相比LIPS-300Z在3kW和5kW工况下束流密度峰值分别降低25%和19%,放电电压分别降低7.8V和6.2V,放电损耗分别增加31W/A和42W/A。此外,LIPS-300H离子推力器在3kW和5kW工况下屏栅预测寿命分别是LIPS-300Z的7.7倍和4.2倍。结果表明:虽然LIPS-300Z比LIPS-300H具有放电损耗低的优点,但其较差的束流均匀性、较高的放电电压和双荷离子比,使其在寿命和可靠性方面劣于LIPS-300H。To further advance the performance and reliability of ion thruster,the advantage and disadvantage of two types of cusp field ion thruster were comparativly studied based on both a diameter 30 cm cylindricalcusp field ion thruster(LIPS-300 Z)and a diameter 30 cm ring-cusp field ion thruster(LIPS-300 H). Firstly,the principle of two types of cusp field was analyzed,and their difference was summarized. Then,the uniformity of beam current density,the discharge efficiency and the lifetime were evaluated and analyzed. Compared to the experimental results of the LIPS-300 Z,the maximum beam current density of LIPS-300 H at the 3 kW and 5 kW mode was decreased by 25% and 19%,and its discharge voltage was reduced by 7.8 V and 6.2 V,while the discharge loss of the LIPS-300 H at two modes increased by 31 W/A and 42 W/A,respectively. In addition,the lifetime of screen grid of LIPS-300 H at the 3 kW and 5 kW mode was 7.7 times and 4.2 times as long as LIPS-300 Z.The results indicated that LIPS-300 Z had a low discharge loss,but its uniformity of beam current density was worse,and the discharge voltage and the ratio of doubly-to-singly charged ions in beam were all high. Therefore,the lifetime and reliability of LIPS-300 H were better than those of LIPS-300 Z.

关 键 词：离子推力器 柱形会切场 环形会切场 束流均匀性 效率 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]