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Study on the influence of the discharge voltage on the ignition process of Hall thrusters
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作者 Wenbo LI Liqiu WEI +6 位作者 Hong LI Yongjie DING Jianning SUN haikuo cai Daren YU Shangmin WANG Ning GUO 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第9期25-37,共13页
A high-speed charge-coupled device camera was used to capture images of the plume and acceleration channel of a Hall effect thruster during ignition at different discharge voltages.To better understand the influence o... A high-speed charge-coupled device camera was used to capture images of the plume and acceleration channel of a Hall effect thruster during ignition at different discharge voltages.To better understand the influence of changes in the discharge voltage on the plasma parameters during thruster ignition,a particle-in-cell numerical model was used to calculate the distribution characteristics of the ion density and electric potential at different ignition moments under different discharge voltages.The results show that when the discharge voltage is high,the ion densities in the plume and acceleration channel are significantly higher at the initial phase of thruster ignition;with the gradual strengthening of the ignition process,the propellant avalanche ionization during thruster ignition occurs earlier and the pulse current peak increases.The main reason for these phenomena is that the change in the discharge voltage results in different energy acquisitions of the emitted electrons entering the thruster channel. 展开更多
关键词 Hall effect thruster ignition process discharge voltage PIC simulation CCD image
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