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Modelling high-pressure plasma using the equivalent circuit model and the mechanisms of photoionization instability

Dehghani, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1088/0031-8949/82/03/035503
  3. Publisher: 2010
  4. Abstract:
  5. In this paper, the main discharge region and the plasma on the pre-ionization section in a TEA-CO2 laser are simulated by a distributed RLC electric circuit. The transmission line method is applied to the nonlinear distributed circuit, and it is approximated by a lumped nonlinear RLC circuit. By this method the governing partial differential equations are reduced to a system of ordinary differential equations. The parameters of the plasma in this laser are obtained by using this model. The possible photoionization instability is presented. To discuss the instability of the plasma, the current density perpendicular to the applied electric field is obtained. Furthermore, the electron concentrations in the main discharge region and on the dielectric plates are presented
  6. Keywords:
  7. Applied electric field ; Dielectric plates ; Distributed circuits ; Distributed RLC ; Electric circuit ; Electron concentration ; Equivalent circuit model ; Pre-ionization ; RLC circuit ; System of ordinary differential equations ; Transmission line methods ; Electric fields ; Electric lines ; Ordinary differential equations ; Photoionization ; Plasma diagnostics ; Plasma stability ; Plasmas ; Electric discharges
  8. Source: Physica Scripta ; Volume 82, Issue 3 , 2010 ; 00318949 (ISSN)
  9. URL: http://iopscience.iop.org/article/10.1088/0031-8949/82/03/035503