物理学报2011，Vol.60Issue(6)：459-463,5.
Hall推力器内饱和鞘层下电子与壁面碰撞频率特性
Features of electron-wall collision frequency with saturated sheath in Hall thruster
摘要
Abstract
In the paper we study the electron-wall collision frequency in Hall thruster using the two-dimensional particle-in-cell method. It is found that electron-wall collision frequency is greatly increased in the state of saturated sheath compared with in the state of classic sheath, and even two orders of magnitude higher. Thus, the contribution of electron-wall collision frequency in the state of saturated sheath to near-wall current will be non-ignorable. In this paper the reason why the electron-wall collision frequency is increased in the state of saturated sheath is further analysed. It is believed that the increase of electron-wall collision frequency is caused by rather low sheath potential drop and the backflow of secondary electron emitted from the wall.关键词
饱和/鞘层/碰撞/频率Key words
saturated/ sheath/ collision/ frequency引用本文复制引用
张凤奎,丁永杰..Hall推力器内饱和鞘层下电子与壁面碰撞频率特性[J].物理学报,2011,60(6):459-463,5.基金项目
中央高校基本科研业务费专项资金(批准号:HEUCF100212)资助的课题 （批准号:HEUCF100212）
