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The European Physical Journal D

, Volume 59, Issue 3, pp 421–425 | Cite as

The sheath criterion for a collisional plasma sheath at the presence of external magnetic field

  • S. F. MasoudiEmail author
  • Zh. Ebrahiminejad
Plasma Physics

Abstract.

The Bohm sheath criterion is modified for collisional plasma containing Boltzmann electrons and cold fluid ions at the presence of external magnetic field. Based on fluid model, the effects of the strength and the orientation of an external magnetic field on the upper and lower limits of Bohm sheath criterion have been studied by considering the collision frequency between ions and neutrals. The results show that the sheath criterion depends on the orientation and magnitude of magnetic field and the ion flow velocity at the sheath boundary.

Keywords

Mach Number Plasma Sheath Collision Force Normalize Number Density Sheath Edge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of PhysicsK.N. Toosi University of TechnologyTehranIran

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