氮气工质10厘米ECRIT中和器实验研究  

Experimental study on 10-cm ECRIT neutralizer with nitrogen gas

作　　者：谈人玮 杨涓[1] 耿海[2] 吴先明[2] 牟浩 Tan Ren-Wei;Yang Juan;Geng Hai;Wu Xian-Ming;Mou Hao(School of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China;Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]西北工业大学航天学院,西安710072 [2]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：《物理学报》2023年第4期169-177,共9页Acta Physica Sinica

摘　　要：10厘米电子回旋共振离子推力器(ECRIT)可以多类型气体工作,应用于吸气式电推进系统具有可行性,研究氮气工质ECRIT的ECR中和器是研究氮氧工质ECRIT的基础.当传统氙气工质10厘米ECRIT的ECR中和器以氮气为工质工作时,由于氮气分子量较低,离子容易漂移出中和器,引出电子电流减小,已不适合以氮气为工质工作.本文基于10厘米传统ECR中和器,以抑制离子漂移出中和器、提升电子引出性能为目的,实验研究适用于氮气工质工作的双极ECR中和器.结果表明,在气体质量流率0.04 mg/s、输入功率10W的条件下,以氮气为工质工作,引出电子电流134 mA时,传统ECR中和器所需的阳极电压为150 V,而双极ECR中和器仅需50 V的阳极电压,下降了约67%;阳极电压40 V时,传统ECR中和器的功率损耗为1204.82 W/A,而双极ECR中和器的功率损耗为95.23 W/A,约为前者的8.3%.氮气工质双极ECR中和器的离子屏蔽效果显著,电子引出性能得到改善.Electron cyclotron resonance ion thruster(ECRIT) with a diameter of 10 cm can be operated in multiple types of gases and it is feasible to be applied to air-breathing electric propulsion systems.The study on the neutralizer of the ECRIT running in nitrogen gas is the basis for the study on the ECRIT running in nitrogenoxygen mixed gas.When the ECR neutralizer of typical 10-cm ECRIT running in xenon gas runs in nitrogen gas,the extracted electron current is reduced,because ions tend to drift out of the neutralizer,due to the lower molecular weight of nitrogen.The typical neutralizer is no longer suitable for running in nitrogen gas.In this work,based on the 10-cm typical ECR neutralizer,in order to inhibit ions drifting out of the neutralizer and improve the performance of electron extraction,a bipolar ECR neutralizer suitable for running in nitrogen gas is experimentally studied.The results show that under the conditions of gas mass flow rate of 0.04 mg/s and input power of 10 W,the anode voltage required by the typical ECR neutralizer running in nitrogen gas is 150 V when the extracted electron current is 134 mA.However,the bipolar ECR neutralizer requires only 50-V anode voltage,which decreases by about 67%.When the anode voltage is 40V,the power loss of the typical ECR neutralizer is 1204.82 W/A,while the power loss of the bipolar ECR neutralizer is 95.23 W/A,which is about8.3% of the former.The ion shielding effect of the bipolar ECR neutralizer running on nitrogen gas is remarkable and the electron extraction performance is improved.

关 键 词：电子回旋共振 离子推力器 中和器 吸气式电推进 

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]