Composition of a plasma generated from N2-O2 by an Ar ion jet in a low pressure reactor

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Abstract

The expansion of a supersonic Ar+ ion jet in a low pressure (0.2 Torr) reactor filled with N2 and O2 has been investigated by means of hydrodynamic modelling. The gas velocity fields and the gas temperature distribution in the three-dimensional reactor have been determined. The formation of different species through the molecular kinetics triggered by the collision of Ar+ ions with N2 and O2 molecules has been studied. We have investigated the effect of the ions velocity and molecular gas flow rates on the gas temperature and species density distributions. We have shown that the main difference between this system and an N2-O2 post-discharge lies in the dissociation degrees of N2 and O2. While in an N2-O2 post-discharge the N2 dissociation degree is low and that of O 2 is high, in the present system this can be varied through the gas flow rate of the molecular gases. We have also shown that the NO(X) molecules formation is governed by the surface processes, which is strongly influenced by the state of the surface.

Original languageEnglish
Article number055201
JournalJournal of Physics D: Applied Physics
Volume43
Issue number5
DOIs
Publication statusPublished - 2010

Fingerprint

low pressure
Gases
reactors
Ions
molecular gases
gas temperature
Plasmas
gas flow
flow velocity
Chemical analysis
dissociation
Flow of gases
ions
Flow rate
Plant expansion
gases
Molecules
density distribution
molecules
temperature distribution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Composition of a plasma generated from N2-O2 by an Ar ion jet in a low pressure reactor. / Kutasi, K.

In: Journal of Physics D: Applied Physics, Vol. 43, No. 5, 055201, 2010.

Research output: Contribution to journalArticle

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