Effect of vacuum backpressure on discharge characteristics of hollow cathode

Zhongxi NING (宁中喜); Yanfeng CHU (初彦峰); Xiaoyu LIU (刘晓宇); Fan LI (李凡); Ximing ZHU (朱悉铭); Daren YU (于达仁)

doi:10.1088/2058-6272/ab4364

Plasma Science and Technology > 2019 > 21(12): 125402. > DOI: 10.1088/2058-6272/ab4364

Zhongxi NING (宁中喜), Yanfeng CHU (初彦峰), Xiaoyu LIU (刘晓宇), Fan LI (李凡), Ximing ZHU (朱悉铭), Daren YU (于达仁). Effect of vacuum backpressure on discharge characteristics of hollow cathode[J]. Plasma Science and Technology, 2019, 21(12): 125402. DOI: 10.1088/2058-6272/ab4364

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Effect of vacuum backpressure on discharge characteristics of hollow cathode

Plasma Propulsion Laboratory, Harbin Institute of Technology, Harbin 150001, People's Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Nos. 61571166, 11775063, and 51736003).

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Received Date: June 02, 2019
Revised Date: September 09, 2019
Accepted Date: September 10, 2019

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Abstract

Abstract

A hollow cathode is the electronic source and neutralizer of the Hall thruster and an ion thruster. When the orbit of an all-electric propulsion satellite changes from 100 km to 36 000 km, the backpressure changes by two to three orders of magnitude. In this paper, the influence of the backpressure on the discharge characteristics of the hollow cathode has been studied experimentally in the so-called diode configuration. With the increase in the backpressure, the anode voltage decreases gradually, and the amplitude of the current oscillation decreases significantly. Additionally, the plasma is relatively stable, the most probable ion energy and the width of the ion energy distribution reduces, and the electron distribution function inclines toward the Maxwell distribution under high backpressure. The analysis results show that the backpressure affects the gas ionization and the ionic acoustic turbulence, which also affects the discharge characteristics of the hollow cathode.
- hollow cathode,
- electron source,
- backpressure,
- plasma

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References (53)

References

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