| 摘要: |
| 本文基于自行研制的微型射频离子推力器BHRIT-4，针对其自中和引出束流形貌特性、外电路特性和束流离子能量特性开展了研究工作。研究结果表明，推力器在自中和引出模式下，自中和引出束流区亮度高，存在强烈电子激发反应，羽流区平均悬浮电势维持在1.19 V；射频自偏压与引出功率不呈正相关关系，存在最佳引出功率值以实现最大射频自偏压，最大射频自偏压超过300 V；自中和引出束流的离子能量分布函数不服从高斯分布且展宽较大，部分工况下存在双峰信号。 |
| 关键词: 空间电推进 射频离子推力器 自中和 引出特性 实验研究 |
| DOI：10.13675/j.cnki.tjjs.2305052 |
| 分类号:V439+.1 |
| 基金项目:装备预研重点实验室基金（6142207200309）；真空技术与物理重点实验室基金（HTKJ2022KL510009）。 |
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| Neutralizer-free extraction characteristics of micro RF ion thruster |
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FU Chencong1, DONG Yicheng1, LI Yifei1, WANG Haibo1, WANG Weizong1, LI Xingda2, WANG Xiaoyi2, YAN Jiaqi1
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1.School of Astronautics，Beihang University，Beijing 102206，China;2.Key Laboratory of Vacuum Technology and Physics，Lanzhou Institute of Space Technology Physics， Lanzhou 730000，China
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| Abstract: |
| Based on the self-developed miniature RF ion thruster BHRIT-4， the research on characteristics of neutralizer-free extraction has been carried out， including extraction beam profile， external circuit and beam ion energy. The research results indicate that in the neutralizer-free extraction mode， the brightness of the neutralizer-free extraction beam region is high and there is a strong electron excitation reaction in this region， the average float potential in the plume region is maintained at 1.19 V. The RF self-bias voltage is not positively correlated with the output power， and there is an optimal output power value to achieve maximum RF self-bias voltage， with a maximum value exceeding 300 V. The ion energy distribution function （IEDF） of the neutralizer-free extraction beam does not follow the Gaussian distribution and has a large broadening， and there is bimodal signal under some conditions. |
| Key words: Space electric propulsion RF ion thruster Neutralizer-free Characteristics of extraction Experimental research |
