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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 nitrogen-oxygen 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 about 8.3% 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.
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Keywords:
- electron cyclotron resonance /
- ion thruster /
- neutralizer /
- air-breathing electric propulsion
[1] 吴先明, 耿海, 贾连军, 蒲彦旭, 贺亚强, 王尚民, 李艳武 2022 真空与低温 28 26
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[10] 胡展 2021 硕士学位论文 (西安: 西北工业大学)
Hu Z 2021 M. S. Dissertation (Xi’an: Northwestern Polytechnical University) (in Chinese)
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图 1 10厘米ECR中和器结构
Figure 1. 10 cm ECR neutralizer structure.
图 2 氙气和氮气工质传统ECR中和器离子密度分布诊断
Figure 2. Ion density distribution diagnosis of typical ECR neutralizer running on nitrogen and xenon gas.
图 3 双极板结构
Figure 3. Bipolar plate structure.
图 4 传统ECR中和器的电子引出实验系统
Figure 4. Experiment system for the electron extraction of typical ECR neutralizer.
图 5 双极ECR中和器的电子引出实验系统
Figure 5. Experiment system for the electron extraction of bipolar ECR neutralizer.
图 6 双极ECR中和器的静电场仿真模型
Figure 6. Electrostatic field simulation model of bipolar ECR neutralizer.
图 7 氮气和氙气工质传统ECR中和器的引出电子电流随阳极电压的变化曲线
Figure 7. Extracted electron current vs. anode voltage of typical ECR neutralizer running on nitrogen and xenon gas.
图 8 不同双极板间隙的双极ECR中和器电流随阳极电压的变化曲线 (a) 总电子电流; (b) 引出与截获电子电流
Figure 8. Current vs. anode voltage at different bipolar plate gaps of bipolar ECR neutralizer: (a) Total electron current; (b) extracted and intercepted electron current.
图 9 不同双极板间隙的双极ECR中和器电子引出孔附近的电场强度分布
Figure 9. Electric field intensity distribution near electron extraction hole of bipolar ECR neutralizer with different bipolar plate gaps.
图 10 不同双极板电压的双极ECR中和器电流随阳极电压的变化曲线 (a) 总电子电流; (b) 引出与截获电子电流
Figure 10. Current vs. anode voltage at different bipolar plate potentials of bipolar ECR neutralizer: (a) Total electron current; (b) extracted and intercepted electron current.
图 11 不同双极板电压的双极ECR中和器电子引出孔附近的电场强度分布
Figure 11. Electric field intensity distribution near electron extraction hole of bipolar ECR neutralizer with different bipolar plate potentials.
图 12 传统和双极ECR中和器以氮气为工质时的引出电子电流特性
Figure 12. Characteristic of the extracted electron current of typical and bipolar ECR neutralizer running on nitrogen gas.
图 13 传统和双极ECR中和器以氙气为工质时的引出电子电流特性
Figure 13. Characteristic of the extracted electron current of typical and bipolar ECR neutralizer running on xenon gas.
图 14 氮气和氙气工质双极ECR中和器的功率损耗
Figure 14. Power loss of bipolar ECR neutralizer running on nitrogen and xenon gas.
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[1] 吴先明, 耿海, 贾连军, 蒲彦旭, 贺亚强, 王尚民, 李艳武 2022 真空与低温 28 26
Google Scholar
Wu X M, Geng H, Jia L J, Pu Y X, He Y Q, Wang S M, Li Y W 2022 Vacuum Cryog. 28 26
Google Scholar
[2] 袁春柱, 张强, 傅丹膺, 赵志明, 张永强, 张永贺, 陆文高, 姚远, 李瀛搏 2021 航天器工程 30 89
Google Scholar
Yuan C Z, Zhang Q, Fu D Y, Zhao Z M, Zhang Y Q, Zhang Y H, Lu W G, Yao Y, Li Y B 2021 Spacecr. Eng. 30 89
Google Scholar
[3] Marchioni F, Cappelli M A 2021 J. Appl. Phys. 130 053306
Google Scholar
[4] Shabshelowitz A 2013 Ph. D. Dissertation (America: University of Michigan)
[5] Hu P, Shen Y, Yao Z, Mao W, Hu Y, Liu X 2021 Vacuum 190 110275
Google Scholar
[6] Schönherr T, Komurasaki K, Romano F, Massuti-Ballester B, Herdrich G 2014 IEEE T. Plasma Sci. 43 287
Google Scholar
[7] Yukai M, Daiki K, Kazutaka N 2020 Proceedings of Space Transportation Symposium FY2019 (Sagamihara, Kanagawa Japan: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS) (JAXA)) p002
[8] Yukai M, Kazutaka N Space Transportation Symposium FY2020 (Zoom, Japan: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS) (JAXA)) p050
[9] Jackson S W, Marshall R 2017 J. Spacecr. Rockets 55 632
[10] 胡展 2021 硕士学位论文 (西安: 西北工业大学)
Hu Z 2021 M. S. Dissertation (Xi’an: Northwestern Polytechnical University) (in Chinese)
[11] Nishiyama K, Hosoda S, Tsukizaki R, Kuninaka H 2020 Acta Astronaut. 166 69
Google Scholar
[12] Kuninaka H, Nishiyama K, Funaki I, Yamada T, Shimizu Y, Kawaguchi J 2006 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit (Sacramento, California: American Institute of Aeronautics and Astronautics) p4318
[13] Morishita T, Tsukizaki R, Morita S, Koda D, Nishiyama K, Kuninaka H 2019 Acta Astronaut. 165 25
Google Scholar
[14] Fu Y, Yang J, Jin Y, Xia X, Meng H 2019 Acta Astronaut. 164 387
Google Scholar
[15] Fu Y, Yang J, Geng H, Wu X, Hu Z, Xia X 2021 Vacuum 184 109932
Google Scholar
[16] 罗立涛, 杨涓, 金逸舟, 冯冰冰, 汤明杰 2015 西北工业大学学报 33 395
Google Scholar
Luo L T, Yang J, Jin Y Z, Feng B B, Tang M J 2015 J. Northwest. Polytech. Univ. 33 395
Google Scholar
[17] Meng H B, Yang J, Huang W B, Xia X, Fu Y L, Hu Z 2019 J. Astronaut. 12 1478 (in Chinese) [孟海波, 杨涓, 黄文斌, 夏旭, 付瑜亮, 胡展 2019 宇航学报 12 1478]
[18] Yang J, Fu Y, Liu X, Meng H, Jin Y 2018 Plasma Sci. Technol. 20 085402
Google Scholar
[19] Itikawa Y 2006 J. Phys. Chem. Ref. Data 35 31
Google Scholar
[20] Funaki I F I, Kuninaka H K H 2001 Jpn. J. Appl. Phys. 40 2495
Google Scholar
[21] Ren L, Wang Y, Ding W, Sun A, Karadag B, Deng Z, Geng J 2022 Rev. Sci. Instrum. 93 034501
Google Scholar
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