Dynamic contraction of the positive column of a self-sustained glow discharge in molecular gas

M. N. Shneider, M. S. Mokrov, G. M. Milikh

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Abstract

In this paper the dynamic contraction of the current channel inside a quasineutral positive column of a self-sustained glow discharge in a rectangular duct with convection cooling is studied. A set of time-dependent two-dimensional equations for the molecular nitrogen is formulated, and then solved numerically. It is shown that, when the threshold condition for the ionization-thermal instability is fulfilled, a high density plasma channel starting from the initial perturbation near one electrode propagates to the opposite electrode. The developed steady-state contracted discharge is uniform along the direction of the current.

Original languageEnglish (US)
Article number033512
JournalPhysics of Plasmas
Volume19
Issue number3
DOIs
StatePublished - Mar 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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