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Title: Electron energy distribution functions and fractional power transfer in “cold” and excited CO{sub 2} discharge and post discharge conditions

A Boltzmann equation, in the presence of superelastic vibrational and electronic collisions and of electron-electron Coulomb collisions, has been solved in CO{sub 2} plasma in discharge and post discharge conditions. Superelastic vibrational collisions play an important role in affecting the electron energy distribution function (eedf) in a wide range of the reduced electric field E/N and of vibrational temperatures characterizing the vibrational modes of CO{sub 2}. An important result is the dependence of fractional power losses and of the relevant rate coefficients on the vibrational temperatures of the system. Superelastic electronic collisions, on the other hand, are the main processes affecting eedf and related quantities in the post discharge conditions (i.e., E/N = 0). In particular at low vibrational temperatures, the superelastic electronic collisions form an important plateau in the eedf, largely influencing the rate coefficients and the fractional power transfer.
Authors:
; ; ; ;  [1]
  1. Nanotec-CNR, sect. Bari, via Amendola 122/D, 70126 Bari (Italy)
Publication Date:
OSTI Identifier:
22493864
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOLTZMANN EQUATION; CARBON DIOXIDE; COULOMB FIELD; DISTRIBUTION FUNCTIONS; ELECTRON TEMPERATURE; ELECTRON-ELECTRON COLLISIONS; ENERGY SPECTRA; PLASMA; POWER LOSSES; VIBRATIONAL STATES