Experimental research on discharge characteristics of LHT40 low power Hall thruster

doi:10.16708/j.cnki.1000-758X.2021.0068

Abstract

Abstract: In order to obtain the discharge characteristics of the 300W class hybrid-excited low-power Hall thruster, a high-precision micro-thrust laser measurement device and an integrated ion current density diagnostic device were used to access the characteristics of thrust, specific impulse, efficiency, beam divergence angle and mass utilization efficiency of the thruster for different operating conditions. There is a maximum for thrust, specific impulse and anode efficiency under discharge voltages from 200V to 300V. The discharge current and voltage exhibit damping-free harmonic oscillation, and the first-order frequency is about 4.05kHz. Under constant electric field and magnetic field, the beam ion current density presents a bipolar diffusion characteristics. When the anode flow rate is increased to 0.95 mg/s, the ion current density shows a typical doublepeak structure, and the mass utilization efficiency is positively correlated with anode mass flow rate.

Key words: electric propulsion, low-power hall thruster, beam divergence angle, discharge characteristics, hybrid excitation

CHEN Xinwei, GU Zuo, GAO Jun, GUO Ning, WANG Shangmin, ZHAO Yong, FENG Jie, SHI Kai, PU Yangxu, LI He. Experimental research on discharge characteristics of LHT40 low power Hall thruster[J]. Chinese Space Science and Technology, 2021, 41(5): 65-74.

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URL: http://journal26.magtechjournal.com/kjkxjs/EN/10.16708/j.cnki.1000-758X.2021.0068

http://journal26.magtechjournal.com/kjkxjs/EN/Y2021/V41/I5/65

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Experimental research on discharge characteristics of LHT40 low power Hall thruster

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