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.
出处
《大连交通大学学报》
CAS
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)
关键词
正离子初速度
电负性
等离子体磁鞘
positive ion initial velocity
electronegativity
plasma sheath in a magnetic field