两种温度电子对稳态等离子体鞘层的影响  

Effects of Two-temperature Electrons on Sheath of Stationary Plasma

作　　者：赵晓云[1] 张开银[1] 张丙开[1] 李世刚[1] 

机构地区：[1]阜阳师范学院物理与电子科学学院,阜阳236037

出　　处：《计算物理》2013年第5期733-738,共6页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(51271059;11273008);安徽省高等学校优秀青年人才基金(2012SQRL116);安徽省高等学校省级自然科学基金(KJ2012Z305)资助项目

摘　　要：建立包含冷热电子的无碰撞等离子体鞘层的流体模型,利用数值模拟研究含有两种温度电子时等离子体鞘层的产生.结果表明:对于含有两种不同温度电子的稳态等离子体,冷电子的温度越低或者冷电子的含量越多,鞘边离子的马赫数临界值就越小,鞘层的宽度就变得越窄,沉积器壁的离子动能流也就越少.此外,研究不同种类的等离子体(Ar、Ke、Xe),鞘层厚度和离子沉积器壁动能流受冷电子的影响.A fluid model including two-temperature electrons was constructed for a collisionless plasma sheath. Effects of two- temperature electrons on sheath of stationary plasma were simulated. It is found that as temperature of cold electron is lower or density of cold electron at sheath adge is smaller critical ion Mach number decreases, sheath width becomes narrow and ion energy flow deposited on wall reduces. In addition, it is discussed that sheath thickness and ion energy flow deposited on wall are affected by cold electron in different plasma species.

关 键 词：等离子体鞘层 等离子体模拟 马赫数 动能流 

分 类 号：O531[理学—等离子体物理]