Sheath Criterion for an Electronegative Plasma Sheath in an Oblique Magnetic Field  

作　　者：刘惠平 邹秀 邱明辉 

机构地区：[1]School of Science Dalian Jiaotong University

出　　处：《Plasma Science and Technology》2014年第7期633-636,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11005015,51002017);Program Funded by Liaoning Province Education Administration(No.L2011069)

摘　　要：The sheath criterion for an electronegative plasma composed of hot electrons,hot negative ions and cold positive ions in an oblique magnetic field is investigated.We discuss the effects of negative ions and external magnetic field on the sheath criterion.We find that the ion Mach number is of relatively low value because of Coulomb attraction between positive and negative ions.Also the ion Mach number depends on the magnitude and the angle of the magnetic field as well as the initial velocity of ion flow.The sheath criterion for an electronegative plasma composed of hot electrons,hot negative ions and cold positive ions in an oblique magnetic field is investigated.We discuss the effects of negative ions and external magnetic field on the sheath criterion.We find that the ion Mach number is of relatively low value because of Coulomb attraction between positive and negative ions.Also the ion Mach number depends on the magnitude and the angle of the magnetic field as well as the initial velocity of ion flow.

关 键 词：sheath criterion electronegative oblique magnetic field 

分 类 号：O53[理学—等离子体物理]