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Plasma sheath evolution from perturbed electrodes in a negative-ion plasma. Part 2. Experiment and PIC simulation

Published online by Cambridge University Press:  01 October 1997

SEUNGJUN YI,
YASSER EL-ZEIN,
KARL E. LONNGREN and
TERENCE E. SHERIDAN
SEUNGJUN YI
Affiliation:
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA
YASSER EL-ZEIN
Affiliation:
Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, Iowa 52242, USA
KARL E. LONNGREN
Affiliation:
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USADepartment of Electrical and Computer Engineering, The University of Iowa, Iowa City, Iowa 52242, USA
TERENCE E. SHERIDAN
Affiliation:
Department of Physics, West Virginia University, Morgantown, West Virginia 26506-6315, USA
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Abstract

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The two-dimensional spatial and temporal evolution of a plasma surrounding an electrode whose potential is suddenly decreased is experimentally investigated. The electrode contains a localized convex or a localized concave perturbation. The quasineutral plasma consists of positive ions and various proportions of negative ions and electrons. The results are compared and contrasted with those that are obtained numerically using a particle-in-cell (PIC) simulation and those that had previously been obtained using a fluid-model code.

Information

Type
Research Article
Information
Journal of Plasma Physics , Volume 58 , Issue 3 , October 1997, pp. 455 - 466
Copyright
1997 Cambridge University Press