空心阴极作为电推力器点火和羽流中和的核心部件,其内部气体放电特性对于阴极的工作性能起着决定性的作用.本文对基于不同发射体的钡钨空心阴极和六硼化镧阴极的放电特性进行了系统的实验研究,结果表明:随着阴极工作参数的不同,两种阴极的放电均表现为三种典型的放电模式；在相同的工作参数下,六硼化镧阴极可维持的放电电流较钡钨阴极的大,工作电流范围也更宽,但钡钨阴极工作时的放电电压更加稳定,应用于霍尔推力器时,有利于推力器工作效率的提高和稳定.%As a key component of electric thrusters,the hollow cathode performance is determined by the gas discharge characteristics inside.In this paper,the BaW hollow cathode and LaB6 hollow cathode which have different emitters were systematically investigated via experiments.The results show that the two hollow cathodes have three distinct modes respectively ss the discharge parameters change.While working at the same discharge parameters,LaB6 can provide a larger current than BaW,and the current range is wider.However,the discharge voltage of BaW is more stable,which could optimize and stabilize the thruster efficiency when applied on Hall Thruster.
展开▼
