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

LIU Huiping(刘惠平); ZOU Xiu(邹秀); QIU Minghui(邱明辉)

doi:10.1088/1009-0630/16/7/01

Plasma Science and Technology > 2014 > 16(7): 633-636. > DOI: 10.1088/1009-0630/16/7/01

LIU Huiping(刘惠平), ZOU Xiu(邹秀), QIU Minghui(邱明辉). Sheath Criterion for an Electronegative Plasma Sheath in an Oblique Magnetic Field[J]. Plasma Science and Technology, 2014, 16(7): 633-636. DOI: 10.1088/1009-0630/16/7/01

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

School of Science, Dalian Jiaotong University, Dalian 116028, China

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

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Received Date: April 24, 2013

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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.
- sheath criterion, electronegative, oblique magnetic field

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