Ion Collection in Hall Thruster Plumes
Ion Collection in Hall Thruster Plumes
复制标题
霍尔推进器羽流中的离子收集
DOI：
10.2514/1.11953
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发表时间：
2006
影响因子：
1.9
通讯作者：
A. Gallimore
中科院分区：
文献类型：
--
作者：
M. Walker;R. Hofer;A. Gallimore
霍尔效应推力器具有高比冲、高效率和高推力密度的特点，在航天器推进方面越来越受欢迎。目前，由于对羽流与航天器相互作用的了解有限，阻碍了HPLF的广泛使用。由于用于HET研究的探头设计和测试设施范围广泛，这种情况变得复杂。本说明报告了两个不同设计的裸法拉第探针，它们同时用于测量5千瓦霍尔推力器的离子电流密度。结果表明，这两个探头测量类似的推力器羽剖面的角度位置范围内的所有操作条件下，与探针的离子电流密度分布之间的微小差异归因于材料的选择。此外，这两个探头测量最高的离子电流密度在最高的设施工作压力的推力器中心线附近。电荷交换碰撞和真空室气体吸入推进器的组合被认为是导致这种现象的原因。实验装置
HE Hall effect thruster’s (HETs) combination of high specific impulse, efficiency, and thrust density has increased its popularity for use as spacecraft propulsion. Currently, the widespread use of HETs is hindered by the limited understanding of plume interaction with the spacecraft. This situation is complicated by the wide rage of probe designs and test facilities used for HET investigations. This Note reports on two nude Faraday probes of differing design that are used simultaneously to measure the ion current density of a 5-kW Hall thruster. The results show that both probes measure similar thruster plume profiles over the range of angular positions investigated for all operating conditions, with small differences between the ion current density profiles of the probes attributed to material selection. Moreover, both probes measure the highest ion current density near thruster centerline at the highest facility operating pressure. A combination of charge-exchange collisions and vacuum chamber gas ingestion into the thruster is believed to cause this phenomenon. Experimental Apparatus