Measurement of neutral xenon density profile in an ion thruster plume
Measurement of neutral xenon density profile in an ion thruster plume
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DOI：
10.2514/6.1996-2290
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发表时间：
1996-06
期刊：
影响因子：
--
通讯作者：
M. Crofton
中科院分区：
文献类型：
--
作者：
M. Crofton
双光子激光诱导荧光法首次测量了离子推力器羽流中的推进剂密度分布。利用英国T5离子推力器对该技术进行了验证，并扩充了栅格离子推力器的信息数据库。中性氙原子负责电荷交换离子的形成，这些离子通过侵蚀提取网格集来限制推进器的寿命，并间接地用网格材料污染相关的航天器。测量了基态中性氙原子的相对密度，考察了其与工作点和羽流空间坐标的关系。计算结果与理论密度计算方法进行了比较。
Two-photon laser-induced-fluorescence has been used to obtain the first measured propellant density profiles in an ion thruster plume. The United Kingdom T5 ion thruster was employed to demonstrate the technique and expand the data base of information concerning gridded ion thrusters. Neutral xenon atoms are responsible for the formation of charge exchange ions which limit thruster lifetime by eroding the extraction grid set, and indirectly contaminate the associated spacecraft with grid material. The relative density of neutral xenon atoms in the ground state has been measured to examine its dependence on operating point and plume spatial coordinate. The results are compared to theoretical means of computing the density.