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Plasma sheath evolution from perturbed electrodes in a negative-ion plasma

Published online by Cambridge University Press:  01 January 1997

YASSER EL-ZEIN ,
SEUNGJUN YI ,
KARL E. LONNGREN ,
IGOR ALEXEFF ,
TERRENCE E. SHERIDAN  and
HULBERT HSUAN
YASSER EL-ZEIN
Affiliation:
Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, Iowa 52242, USA
SEUNGJUN YI
Affiliation:
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA
KARL E. LONNGREN
Affiliation:
Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, Iowa 52242, USA Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA
IGOR ALEXEFF
Affiliation:
Department of Electrical Engineering University of Tennessee, Knoxville, Tennessee 37996-2100, USA
TERRENCE E. SHERIDAN
Affiliation:
Permanent address: Department of Physics, West Virginia University, Morgantown, West Virginia 26506-6315, USA. Division of Science and Mathematics Glenville State College, Glenville, West Virginia 26351, USA
HULBERT HSUAN
Affiliation:
Princeton Plasma Physics Laboratory, Princeton, New Jersey 08563, USA
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Abstract

The two-dimensional spatial and temporal evolution of the components of a plasma surrounding an electrode whose potential is suddenly decreased is investigated numerically. The electrode contains a localized convex or a localized concave voltage perturbation. The quasineutral plasma consists of positive ions and various proportions of negative ions and electrons. The results are compared and contrasted with those obtained with a uniform electrode under identical plasma conditions.

Type
Research Article
Information
Journal of Plasma Physics , Volume 57 , Issue 1 , January 1997 , pp. 47 - 57
Copyright
1997 Cambridge University Press

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