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Title: The role of electron scattering with vibrationally excited nitrogen molecules on non-equilibrium plasma kinetics

Electron energy distribution functions have been calculated by a self-consistent model which couples the electron Boltzmann equation with vibrationally and electronically excited state kinetics and plasma chemistry. Moderate pressure nitrogen gas discharges in the E/N range from 30 to 60 Townsend are investigated comparing an electron-impact cross section set considering transitions starting from all the vibrational states, with reduced models, taking into account only collisions involving the ground vibrational level. The results, while confirming the important role of second kind collisions in affecting the eedf, show a large dependence of the eedf on the set of inelastic processes involving vibrationally and electronically excited molecules, pointing out the need of using a cross section database including processes linking excited states in non-equilibrium plasma discharge models.
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [4]
  1. Dipartimento di Chimica, Universit√° di Bari, Via Orabona 4, 70125 Bari (Italy)
  2. (Italy)
  3. CNR-IMIP, Via Amendola 122/D, 70126 Bari (Italy)
  4. Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom)
Publication Date:
OSTI Identifier:
22218487
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATOM-MOLECULE COLLISIONS; BOLTZMANN EQUATION; COMPARATIVE EVALUATIONS; CROSS SECTIONS; ELECTRONS; ENERGY SPECTRA; GROUND STATES; MOLECULE-MOLECULE COLLISIONS; MOLECULES; NITROGEN; NON-EQUILIBRIUM PLASMA; TOWNSEND DISCHARGE; VIBRATIONAL STATES