磁场强度对霍尔推力器放电特性影响的实验研究  

On the role of magnetic field intensity effects on the discharge characteristics of Hall thrusters

作　　者：鄂鹏[1] 于达仁[2] 武志文[3] 韩轲[1] 

机构地区：[1]哈尔滨工业大学电气工程系,哈尔滨150001 [2]哈尔滨工业大学能源秘学与工程学院,哈尔滨150001 [3]北京科技大学机械工程学院,北京100083

出　　处：《物理学报》2009年第4期2535-2542,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60871035,50877018);长江学者和创新团队发展计划(批准号:IRT0520)资助的课题~~

摘　　要：为探索霍尔推力器通道内优化磁场的标准,本文研究了磁场强度对其放电特性的影响规律.通过在保持磁场形貌不变("聚焦"形)下改变磁场强度的大小,使用朗缪尔探针、光谱仪等测量手段分析了工作于不同磁安特性曲线段的推力器放电特性.研究表明:当磁场强度小于优化值时,电子横越磁场的传导以近壁传导机制为主;反之,当磁场强度大于优化值时,放电电流反常变化,而现有的电子输运传导机制不能解释这种现象.We investigates the magnetic field intensity effects on the discharge characterization of Hall thrusters for optimization of the magnetic fields by varying the strength of magnetic fields with its topography holds constant（keep in ＂focusing＂ type）,and making an experimental study of the thruster＇s operating performance working in different regions of magnetoampere curve through Langmuir probe,spectrograph,etc..The results shows that when the magnitude of magnetic field intensity is less than its optimal value,nearwall conductivity gives priority to the activity that electrons traverse the magnetic field;contrarily,discharge current varying with magnetic field intensity abnormally,and existing electrons conductive theories are failed to explain this phenomenon.

关 键 词：霍尔推力器 磁场强度 放电特性 

分 类 号：O441[理学—电磁学] TN141.5[理学—物理]