The structure of an electronegative magnetized plasma sheath with non-extensive electron distribution  

作　　者：Xiu ZOU Huiping LIU Yongzheng ZHU Xiaonan ZHANG Minghui QIU 邹秀;刘惠平;朱永政;张小楠;邱明辉(School of Science,Dalian Jiaotong University,Dalian 116028,People's Republic of China)

机构地区：[1]School of Science,Dalian Jiaotong University,Dalian 116028,People's Republic of China

出　　处：《Plasma Science and Technology》2020年第12期1-7,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.10605008);the Scientific Research Foundation of the Education Department of Liaoning Province,China(Nos.L2011069,JDL2017012)。

摘　　要：In this paper, an electronegative magnetized plasma sheath model with non-extensive electron distribution is established, and the Bohm criterion affected by the non-extensive parameter q is theoretically derived. The ion Mach number varies with q. The numerical simulation results show that compared with electronegative magnetized plasma sheath with Maxwell distribution(q=1), the sheath structures with super-extensive distribution(q<1) and sub-extensive distribution(q>1) are different. The physical quantities including the sheath potential distribution, ion density distribution, the electron density distribution, negative ion density distribution and the net space charge density distribution are discussed. It is shown that the non-extensive parameter q has a significant influence on the structure of the electronegative magnetized plasma sheath. Due to the Lorentz force, both the magnitude and the angle of the magnetic field affect the structure of the sheath, whether the electrons are Maxwell distributed or non-extensively distributed.

关 键 词：plasma SHEATH non-extensive distribution 

分 类 号：O53[理学—等离子体物理] O441[理学—物理]