The Bohm criterion for a dusty plasma sheath |
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Authors: | B P Pandey Anjan Dutta |
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Institution: | (1) New York State University at Buffalo, 14214 New York, USA;(2) Department of Physics and Astrophysics, University of Delhi, 110 007 Delhi, India |
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Abstract: | The formation of the sheath in a dusty plasma is investigated. The Bohm criterion is derived for two different cases: (a)
when electrons are in thermodynamic equilibrium and dust grains provide the immobile, stationary background and (b) when both
electrons and ions are in thermodynamic equilibrium and dust grains are moving. In the first case, Bohm criterion gets modified
due to the fluctuation of the charge on the grain surface. In the second case, the collisional and Coulombic drag play important
role in determining the Bohm criterion. |
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Keywords: | Dusty plasma Bohm criteria plasma sheath |
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