针对附加场磁等离子体推力器(AF-MPDT)阴阳极供气量对推力器性能的影响进行了研究。采用试验方法测量了稳态AF-MPDT的束流参数以及放电电压、放电电流、附加磁感应强度等工况参数,测量计算了推力、效率等性能参数。通过改变阴阳极供气比例,分析研究了初始气体分布对推力器性能及物理机制的影响。研究结果显示,阴极供气比重增大时,推力器推力及效率相应增大,但增大到一定比例,推力器出现工作不稳定导致性能下降,说明阴阳极存在最佳的供气比例,表明供气比例对推力器性能具有重要影响。 The influence of the anode-cathode gas supply volume of the additional field magnetic plasma thruster (AF-MPDT) on the thruster performance was studied. The beam parameters of steady-state AF-MPDT and parameters of discharge voltage, discharge current and additional magnetic flux density were measured by experimental methods. The performance parameters such as thrust and efficiency were measured and calculated. By changing the ratio of gas supply to cathode and anode, the influence of initial gas distribution on the performance and physical mechanism of thruster was analyzed. The results show that when the cathode gas supply proportion increases, the thrust force and efficiency of the thruster increase correspondingly, but when the proportion of the cathode thruster increases, the performance of the thruster becomes unstable due to the unsteady operation of the thruster, indicating that there is an optimal ratio of gas supply to the anode and the cathode, The proportion of gas supply has an important influence on the performance of the thruster.