Microinstabilities in a 10-Kilowatt Self-Field Magnetoplasmadynamic Thruster
Microinstabilities in a 10-Kilowatt Self-Field Magnetoplasmadynamic Thruster
复制标题
10 千瓦自场磁等离子动力推进器中的微观不稳定性
DOI：
10.2514/3.24040
复制
发表时间：
1996
影响因子：
1.9
通讯作者：
R. Jahn
中科院分区：
文献类型：
--
作者：
D. Tilley;E. Choueiri;A. J. Kelly;R. Jahn
摘要：理论研究表明，各种微观和宏观等离子体不稳定性可以显着影响磁等离子体动力学（MPD）推力器的性能，但它们存在的实验证据是非常有限的。本研究的目的是提供实验证据的存在下，在10千瓦级，自场MPD推力器的微观不稳定性。本研究中研究的推力器工作电流范围的下限由电磁推力分量远大于电磁推力分量的要求设定。工作电流的上限由高频推力器电压振荡的初始观测值确定，高频推力器电压振荡通常与推力器过度腐蚀的发生有关。在推力器近场羽流中获得了两种微不稳定性的实验证据：1）广义低杂波漂移不稳定性和2）电子回旋漂移不稳定性。
Abstract : Theoretical studies indicate that a variety of microscopic and macroscopic plasma instabilities can significantly affect the performance of the magnetoplasmadynamic (MPD) thruster, yet experimental evidence for their existence is extremely limited. The objective of this research was to provide experimental evidence for the existence of microinstabilities in a 10-kW-class, self-field MPD thruster. The lower- bound of the range of thruster operating currents investigated in this study was set by the requirement that the electromagnetic thrust component be much greater than the electrothermal thrust component. The upper-bound of the operating current was set by the initial observation of high-frequency thruster voltage oscillations, which is usually associated with the onset of excessive thruster erosion. Experimental evidence for two microinstabilities was obtained in the near-field plume of the thruster: 1) the generalized lower hybrid drift instability and 2) the electron cyclotron drift instability.