Effects of Channel Wall Material on Performance and Plasma Characteristics of Hall Thrusters
Effects of Channel Wall Material on Performance and Plasma Characteristics of Hall Thrusters
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发表时间：
2005
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通讯作者：
H. Tahara;K. Imanaka
中科院分区：
文献类型：
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作者：
H. Tahara;K. Imanaka
研究了通道壁材料对霍尔推力器性能和等离子体特性的影响。采用BN、BNSiN和BNALN三种通道壁材料对实验室模型霍尔推力器THT-Ⅲ进行了工作。放电电流和推力都受到通道壁材料性质的影响。测量的壁和等离子体电位，径向和轴向电子温度，和电子数密度附近的通道壁的轴向分布表明，壁材料的影响电离区域和离子壁损失的通道中，导致二次电子发射，虽然离子加速区域是由径向磁场的轴向分布。通道壁材料之间的放电电流的差异被认为是由内通道壁附近的轴向电流密度的差异引起的，取决于二次电子发射。
The effects of channel wall material on Hall thruster performance and on plasma characteristics were investigated. A laboratory-model Hall thruster THT-III was operated with three channel wall materials of BN, BNSiN and BNAlN. Both the discharge current and the thrust were affected by the nature of the channel wall materials. The measured axial distributions of wall and plasma potentials, radial and axial electron temperatures, and electron number density near the channel walls showed that the wall material affected ionization region and ion wall loss in the channel, resulting from secondary electron emission, although ion acceleration region was determined by the axial distribution of radial magnetic field. The difference in discharge current between channel wall materials was considered to be caused by the difference in axial current density near the inner channel wall, depending on secondary electron emission.