离子发动机空心阴极电势脉动研究进展

Hollow cathode is a core part of the ion thruster. There exists an unstable discharge phenomenon in which the discharge voltage oscillates. The discharge voltage oscillations produce high-energy ions in the cathode plumes with energy significantly in excess of the discharge voltage and these high energy ions caused higher erosion rates than the anticipated erosion rates. In this study, we introduce the reason of different types of voltage oscillations and research progress, and analyze the present status of experimental and theoretical studies both at home and abroad. Finally, we put forward the major difficulties, key problems and possible solutions for future research prospects. In this paper