射频自偏压效应离子推力器束流特性实验研究  

Experimental Study on Ion Beam Characteristics of Ion Thruster Using RF Self-Bias Effect

作　　者：杨谨远 张思远 邓海军 李程[1] 冯晨曦 李昊霖 李依潇 陈铮 孙安邦[1] YANG Jin-yuan;ZHANG Si-yuan;DENG Hai-jun;LI Cheng;FENG Chen-xi;LI Hao-lin;LI Yi-xiao;CHEN Zheng;SUN An-bang(State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Inner Mongolia Power Machinery Research Institute,Hohhot 010010,China;China Changfeng Mechanics and Electronics Technology Academy,Beijing 100854,China)

机构地区：[1]西安交通大学电气工程学院电力设备电气绝缘国家重点实验室,陕西西安710049 [2]内蒙动力机械研究所,内蒙古呼和浩特010010 [3]中国长峰机电技术研究设计院,北京100854

出　　处：《推进技术》2023年第6期92-100,共9页Journal of Propulsion Technology

基　　金：未来实验室联合基金(JZ-202109003);电力设备电气绝缘国家重点实验室资助(EIPE22116)。

摘　　要：为了获得不同推力器工况对射频自偏压效应离子推力器的自偏压幅值和束流特性的影响,本文通过地面实验研究了栅极射频功率、线圈放电功率、工质种类对自偏压幅值和羽流区等离子体参数的影响,同时对直流栅极工况和射频栅极工况下的束流特性进行了对比。研究结果表明:栅极射频功率的增大会提高自偏压幅值并提升束流强度,但在较高栅极射频功率下,栅极下游区域将发生自持放电并形成等离子体;放电腔内放电模式转换会通过改变等离子体阻抗的方式大幅影响栅极直流自偏压幅值和栅极电压的射频分量,进而影响羽流区等离子体参数;与直流栅极工况相比,射频栅极能同时引出并加速离子和电子,并在栅极下游实现自中和,且在Ar,Kr,Xe三种工质下均具有自中和能力。In order to obtain the influences of thruster’s operating condition on the self-bias amplitude and ion beam characteristics of ion thruster using RF self-bias effect,the effects of grid’s RF power,antenna’s dis⁃charge power and propellant on the self-bias amplitude and plasma parameters in the plume region were studied,and the ion beam characteristics under DC and RF modes were compared through ground experiments in this pa⁃per.The results show that the increase of grid’s RF power helps to enlarge the self-bias amplitude and improve the intensity of ion beam,but a higher power would cause self-sustained discharge and form plasma in the down⁃stream region of the grids.The change of discharge mode in the chamber greatly affects the self-bias and RF am⁃plitude by changing plasma’s impedance,and then influences the plasma parameters in the plume region.Compared with DC mode,thruster working under RF mode can simultaneously extract and accelerate ions and elec⁃trons,and realize self-neutralization downstream the grids.Self-neutralization can be achieved by using Ar,Kr and Xe as propellant.

关 键 词：自中和 射频自偏压效应 离子推力器 束流特性 实验研究 

分 类 号：V439.1[航空宇航科学与技术—航空宇航推进理论与工程]