| Citation: | HU J，GENG H，YANG F Q，et al. Optimization of discharge chamber key parameters for 10 cm Kaufman xenon ion thruster[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（8）：1974-1981 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0631
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Discharge chamber configuration is the foundation and core of ion thruster structure design, which directly influences the working efficiency of the discharge chamber and in-orbit lifetime of the thruster. Aiming at the application requirement of new complex aerospace equipment for ion thruster with long-life, high thrust wide-range and continuous variable-thrust, this research explored the key factors of discharge chamber configuration parameters influencing the efficacy of 10 cm ion thruster, as well as the influence of magnetic field divergence, electron channel area and hollow cathode position and other sensitive parameters on discharge chamber performances. Then optimization of parameter configuration and verification of discharge chamber of 10 cm ion thruster were conducted. The results showed that by optimizing discharge chamber key parameters, the maximum thrust of 10 cm ion thruster increased from 20 mN to 25 mN, 25% higher without changing the mechanical structure of the thruster, which extended the thrust adjustment range from 1−20 mN to 1−25 mN, and enhanced the thrust resolution in the whole range to more than 50 μN. Moreover, the anode potential dropped to 38.4 V from 43.5 V, the discharge loss dropped to 308 W/A from 345 W/A, and the estimated lifetime of thruster will be increased from 15000 h to 17500 h. The above research will certainly provide technical support for the extended in-orbit application of 10 cm ion thruster.
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