Measurement of plasma flow and electron energy probability function in radio frequency plasma thruster with a magnetic cusp
Measurement of plasma flow and electron energy probability function in radio frequency plasma thruster with a magnetic cusp
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DOI：
10.1063/5.0071606
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发表时间：
2022-05-07
影响因子：
3.2
通讯作者：
Nishida, H.
中科院分区：
文献类型：
--
作者：
Furukawa, T.;Yarita, Y.;Nishida, H.
在对磁化感应耦合等离子体理论分析的基础上，研究了利用尖形磁场改善小型无电极射频等离子体推力器推力性能的方法。在这种类型的推力器中，电子在决定推力性能方面起着关键作用。利用电子能量概率函数和等离子体参数的二维分布来表征尖点型磁场射频推力器中等离子体的流动。得到了非麦克斯韦的EEPF，它对应于等离子体羽流中的压力和等离子体电位分布。此外，轴向离子速度进行了测量，并在下游方向的离子通量的存在下被揭示，表明理想的离子加速。
The use of a cusp magnetic field is studied to improve the thrust performance of small electrodeless radio frequency (RF) plasma thrusters based on a theoretical analysis of a magnetized inductively coupled plasma. In this type of thruster, electrons play a critical role in determining the thrust performance. The electron energy probability function (EEPF) and two-dimensional profiles of the plasma parameters in the cusp-type magnetic field RF thruster are investigated to characterize the plasma flow. Non-Maxwellian EEPFs were obtained, which correspond to the pressure and plasma potential profiles in the plasma plume. In addition, the axial ion velocity was measured, and the presence of ion flux in the downstream direction is revealed, indicating ideal ion acceleration.