Study on the influences of ionization region material arrangement on Hall thruster channel discharge characteristics

Xiang HU (胡翔); Ping DUAN (段萍); Jilei SONG (宋继磊); Wenqing LI (李文庆); Long CHEN (陈龙); Xingyu BIAN (边兴宇)

doi:10.1088/2058-6272/aa9b87

Plasma Science and Technology > 2018 > 20(2): 24008-024008. > DOI: 10.1088/2058-6272/aa9b87

Xiang HU (胡翔), Ping DUAN (段萍), Jilei SONG (宋继磊), Wenqing LI (李文庆), Long CHEN (陈龙), Xingyu BIAN (边兴宇). Study on the influences of ionization region material arrangement on Hall thruster channel discharge characteristics[J]. Plasma Science and Technology, 2018, 20(2): 24008-024008. DOI: 10.1088/2058-6272/aa9b87

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Study on the influences of ionization region material arrangement on Hall thruster channel discharge characteristics

1 College of Science, Dalian Maritime University, Dalian 116026, People’s Republic of China 2 Transportation Engineering Postdoctoral Research Station, Dalian Maritime University, Dalian 116026, People’s Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Grant Nos. 11275034, 11605021, 11375039), the China Postdoctoral Science Foundation (Grant No. 2017M621120), the Key Project of Science and Technology of Liaoning Province (Grant No. 201601074) and ‘the Fundamental Research Funds for the Central Uni?versities’ (Grant No. 3132017070)

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Received Date: July 30, 2017

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Abstract

Abstract

There exists strong interaction between the plasma and channel wall in the Hall thruster, which greatly affects the discharge performance of the thruster. In this paper, a two-dimensional physical model is established based on the actual size of an Aton P70 Hall thruster discharge channel. The particle-in-cell simulation method is applied to study the influences of segmented low emissive graphite electrode biased with anode voltage on the discharge characteristics of the Hall thruster channel. The influences of segmented electrode placed at the ionization region on electric potential, ion number density, electron temperature, ionization rate, discharge current and specific impulse are discussed. The results show that, when segmented electrode is placed at the ionization region, the axial length of the acceleration region is shortened, the equipotential lines tend to be vertical with wall at the acceleration region, thus radial velocity of ions is reduced along with the wall corrosion. The axial position of the maximal electron temperature moves towards the exit with the expansion of ionization region. Furthermore, the electron-wall collision frequency and ionization rate also increase, the discharge current decreases and the specific impulse of the Hall thruster is slightly enhanced.
- Hall thruster,
- segmented electrode,
- particle-in-cell,
- wall material

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References (32)

References

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Study on the influences of ionization region material arrangement on Hall thruster channel discharge characteristics