Thermal equilibrium criteria in a nitrogen plasma

Details Thermal equilibrium criteria in a nitrogen plasma Thermal equilibrium criteria in a nitrogen plasma

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jqsrt..15..963c&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 15, Oct. 1975, p. 963-978. Research supported by the South Af

Computer Science

7

Electron Density (Concentration), Nitrogen Plasma, Plasma Density, Plasma Temperature, Thermodynamic Equilibrium, Electron Energy, Gas Ionization, Molecular Collisions, Plasma Diagnostics, Radiative Recombination, Recombination Coefficient

Scientific paper

A method for obtaining the lower electron density limit for LTE in a nitrogen plasma is described, whereby the experimentally determined ratio of the collisional-radiative ionization and recombination coefficients (S/alpha) is compared with the corresponding LTE value (Saha ratio). It is argued that if the electron density is increased from values of about ten to the sixteenth power per cu cm, S/alpha should tend to the Saha ratio as LTE is approached. For NII and NIII spectral lines, this is found to happen at an electron density of a few times ten to the sixteenth power per cu cm when the electron temperature is about 3 eV, in good agreement with the LTE criterion of Griem.

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