正离子初速度对电负性等离子体磁鞘结构的影响  

Effects of Positive Ion Initial Velocity on Electronegative Plasma Sheath Structure in a Magnetic Field

作　　者：刘惠平[1] 邹秀[1] 邱明辉[1] 张志华[2] 何明 

机构地区：[1]大连交通大学理学院,辽宁大连116028 [2]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2011年第6期105-108,共4页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(11005015;10605008;51002017)

摘　　要：采用流体模型经过理论推导得到了电负性等离子体磁鞘的玻姆判据,并数值研究了正离子进入鞘层时的初速度对电负性等离子体磁鞘中带电粒子密度及电势分布的影响.研究结果表明:正离子进入鞘层时y方向的初速度对磁鞘中带电粒子的密度和电势分布有较大的影响,而其z方向的初速度对磁鞘中带电粒子密度分布的影响很小.Using a fluid model, the Bohm criterion is obtained for the electronegative plasma sheath in a magnetic field by theoretical deduction, and the effects of positive ion initial velocity into the sheath on the charged particle density and electric potential distributions in electronegative plasma sheath in the presence of a magnetic field are numerically investigated. The results reveal that the initial velocity of positive ion in the y axis direction has greater effects on the charged particle density and electric potential distributions , while the influence of positive ion initial velocity in z axis on the charged particle density distributions is unconspicuous.

关 键 词：正离子初速度 电负性 等离子体磁鞘 

分 类 号：O53[理学—等离子体物理]