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The Bohm-sheath criterion in plasmas containing electrons and multiply charged ions

Published online by Cambridge University Press:  12 November 2012

MANSOUR KHORAMABADI ,
HAMID GHOMI  and
P. K. SHUKLA
MANSOUR KHORAMABADI
Affiliation:
Department of Physics, Borujerd Branch, Islamic Azad University, Borujerd, Iran ([email protected])
HAMID GHOMI
Affiliation:
Laser and Plasma Research Institute, Shahid Beheshti University, Evin 1983963113, Tehran, Iran
P. K. SHUKLA
Affiliation:
International Centre for Advanced Studies in Physical Sciences and Institute for Theoretical Physics, Ruhr University Bochum, D-44780 Bochum, Germany Department of Mechanical and Aerospace Engineering & Center for Energy Research, University of California San Diego, La Jolla, CA 92093, USA
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Abstract

Using the multi-fluid model of plasmas, we have analytically obtained a generalized Bohm criterion in the plasma, including hot electrons and multiply charged ions, and have numerically examined its validity. The new Bohm-sheath criterion shows that increasing the charge number of positive ions and decreasing the charge number of negative ions would increase the minimum ion speed that is required for the Bohm criterion to satisfy.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 3 , June 2013 , pp. 267 - 271
Copyright
Copyright © Cambridge University Press 2012 

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