Ionization effects and linear stability in a coaxial plasma device

KURT E., Kurt H. H., Bayhan U.

CENTRAL EUROPEAN JOURNAL OF PHYSICS, vol.7, no.1, pp.123-129, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.2478/s11534-008-0135-9
  • Journal Name: CENTRAL EUROPEAN JOURNAL OF PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.123-129
  • Keywords: coaxial plasma device, oscillatory instability, ionization, BREAKDOWN, PHASE, DYNAMICS
  • Gazi University Affiliated: Yes

Abstract

A 2-D computer simulation of a coaxial plasma device depending on the conservation equations of electrons, ions and excited atoms together with the Poisson equation for a plasma gun is carried out. Some characteristics of the plasma focus device (PF) such as critical wave numbers a(c) and voltages U-c in the cases of various pressures P are estimated in order to satisfy the necessary conditions of traveling particle densities (i.e. plasma patterns) via a linear analysis. Oscillatory solutions are characterized by a nonzero imaginary part of the growth rate (sic)(sigma) for all cases. The model also predicts the minimal voltage ranges of the system for certain pressure intervals.