离子液体电喷射束的目标性能特征表征
Steven M Arestie1, Colleen M Marrese-Reading1, Saba Z Shaik2
1NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, 91109 CA USA.
概括
了解设施效应对于电子喷雾推进器测试至关重要. 这项研究量化了二次粒子冲击,并证明了光束目标设计如何可以防止人工膨胀的电流测量,确保准确的性能合格.
科学领域:
- 太空飞船的推进系统
- 血物理学的等离子体物理学
- 材料科学是一种材料科学.
背景情况:
- 电子喷射推进器对于长期太空任务至关重要,但地面测试因设施效应而复杂化.
- 以前的研究集中在光束物理和羽毛动力学上,忽视了设施相互作用.
- 设施效应,如二次颗粒生成,可以显著影响推进器性能和寿命.
研究的目的:
- 为了描述离子液体电喷冲击对光束目标产生的二次粒子的重要性.
- 调查新型光束目标设计和偏差对这些二次粒子的影响.
- 提供实验和建模数据,以减轻电子喷雾推进器测试中的设施效应.
主要方法:
- 来自光束目标的二次电流和质量流量的实验测量.
- 二次粒子的初始飞行时间测量.
- 计算建模以支持实验数据的解释.
主要成果:
- 已识别的二次粒子,其电荷-质量比低至31C/kg.
- 证明,由于电子回流,不适当的光束目标偏向或目标的缺失可以使发射电流膨胀高达20%.
- 优化的光束目标和屏幕电压分别被确定为-100V和-200V.
结论:
- 对于精确的电喷推进器测试,必须考虑设施效应,特别是二次粒子生成和电子回流.
- 适当的光束目标设计和偏差对于减轻这些影响和防止性能指标人工膨胀至关重要.
- 这项研究提高了对设施效应的理解和缓解,这对于在太空飞行任务中合格的电喷射推进器至关重要.
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