Analytical Calculation of Gas Temperature and Experimental Determination of Electron Temperature in Gas Discharge in Ne–He Mixtures

Thermal conductivities of binary gas systems are calculated on the basis of existing experimental data and of 12-6 Lennard-Jones and rigid-sphere interatomic interaction approximations for the case of gas discharge in Ne-He mixtures. Assuming that the gas temperature varies only in the radial direction and using the calculated thermal conductivities, an analytical solution of the steady-state heat conduction equation is found for uniform power input. Two cases are considered: taking or not taking into account the radiance of a ceramic tube insert. Measurement of the relative intensities of some He and Ne spectral lines, originating from different upper levels, has enabled us to determine the average electron temperature, using a line-ratio method of optical emission spectroscopy.