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针对未来深空探测任务对高功率电推力器的需求,兰州空间技术物理研究所开展了5 k W环型离子推力器的研制。环型离子推力器放电室设计与传统离子推力器有很大不同,面临着放电不稳定、不均匀、放电损耗过大等潜在的技术风险。在原理样机完成设计、制造工作后,开展了试验研究工作,通过性能摸底试验对推力器电气参数变化规律进行研究并找到最佳的工作点,通过等离子体诊断试验对放电室内等离子体密度和电子温度分布情况进行研究。试验结果表明:环型放电室在很宽的放电电流范围内都有很高的稳定性,在单阴极偏置的情况下推力器束流仍然具有较好的均匀性,初步验证了环型离子推力器概念的可行性,为下一步优化设计打下了技术基础。
In response to the demand of high-power electric thrusters for deep space exploration missions in the future, Lanzhou Institute of Space Technology Physics has developed the 5 k W toroidal ion thruster. Toroidal ion thruster discharge chamber design and traditional ionic thrusters are very different, facing the discharge instability, uneven, excessive discharge loss and other potential technical risks. After the completion of the design and manufacture of the prototype, a pilot study was carried out to study the variation law of the electrical parameters of the thrusters and find the best working point through the performance test. Through the plasma diagnostic test, the plasma density and electron density Temperature distribution study. The experimental results show that the toroidal discharge chamber has very high stability over a wide range of discharge current, and the uniformity of the thruster beam current still remains well under the single-cathode bias. It is preliminarily verified that the toroidal ion The feasibility of the concept of thrusters, laid the technical foundation for the next step to optimize the design.