Numerical simulation of the effect of backpressure on the discharge characteristics of a Hall effect thrusterHong Li, Shengyi Hu, Demai Zeng, Yongjie Ding, Liqiu Wei, Daren Yu and Zhiyong GaoEur. Phys. J. D, 74 2 (2020) 29DOI: https://doi.org/10.1140/epjd/e2019-100331-7