物理学报2012，Vol.61Issue(20)：303-309,7.
电子温度各向异性对霍尔推力器中等离子体与壁面相互作用的影响
Effect of electron temperature anisotropy on plasma-wall interaction in Hall thruster
摘要
Abstract
To further reveal the physical mechanism of the saturated electron temperature which is about 50--60 eV in the discharge channel of Hall thruster, the effect of electron temperature anisotropy (ETA) on plasma-wall interaction in Hall thruster is studied by using a 2D3V particle-in-cell sheath dynamic model. Some important physical parameters such as electron-wall collision frequency, electron energy deposition at wall and the cooling effect of near-wall sheath on channel electron are calculated. Numerical results indicate that the influence of ETA on plasma-wall interaction is neglectable when electron temperature is low. However, when Te 〉 24 eV, the ETA can significantly reduce electron-wall collision frequency, thereby reducing the electron energy deposition at wall and weakening the cooling effect of near-wall sheath on channel electron. It suggests that the anisotropy of electron temperature tends to increase the saturated electron temperature in the discharge channel of Hall thruster through remarkably weakening the interaction between channel electron and wall.关键词
霍尔推力器/电子温度各向异性/等离子体与壁面相互作用/粒子模拟Key words
Hall thruster/electron temperature anisotropy/plasma-wall interaction/particle-in-cell simulation分类
数理科学引用本文复制引用
卿绍伟,鄂鹏,段萍..电子温度各向异性对霍尔推力器中等离子体与壁面相互作用的影响[J].物理学报,2012,61(20):303-309,7.基金项目
中央高校基本科研业务费,(批准号：0903005203189),国家自然科学基金,(批准号：11005025,10975026),哈尔滨工业大学科学研究创新基金,(批准号：HITNSRIF2009044)和辽宁省科学技术计划重点项目,(批准号：2011224007)资助的课题. （批准号：0903005203189）
