大功率霍尔电推进研究现状与关键技术

Research Status and Key Technologies of High-Power Hall Electric Propulsion

综述了大功率霍尔电推进技术的国内外研究现状,并结合未来空间任务需求,指出了大功率霍尔电推进技术的发展趋势。根据大功率霍尔电推进的技术特点,从基本理论和工程实现的角度,指出了大功率下需要攻克的关键技术,主要包括:较高等离子体密度带来的离子热能化和溅射腐蚀增强问题、大电流动态感应磁场干扰问题、严重的热负荷问题、大结构尺寸问题、大发射电流阴极、变工质放电、阴极中置以及地面试验问题等,并分析了相应关键技术的解决途径和技术方向。

The research status on the high-power Hall electric propulsion technology is introduced,and the tendency is also presented on the basis of space missions in the future.According to the technical characteristics of the high-power Hall electric propulsion,several key technologies,i.e.ion thermalization and enhanced erosion due to the high plasma density,interference of the magnetic field induced by the large current,thermal design in the high power,realization of the large size components,large emission current hollow cathode,discharging with alternative propellants,internally mounted cathodes and ground test problem,are expatiated.Fi- nally,some settlements and technical solutions are given in a situation.