Temperature measurements in glow discharges with ultraviolet Filtered Rayleigh Scattering
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1999 by Azer P. Yalin et al. We report the first spatially resolved temperature measurements in weakly inonized plasmas obtained by Filtered Rayleigh Scattering. A measurement system that pairs the frequency tripled output (254nm) of a titanium sapphire laser with a narrow linewidth atomic mercury filter was used. Temperature measurements were performed in 50 torr glow discharges of argon, and argon mixed with 1% nitrogen, Measurements of axial temperature as a function of discharge current and radial profiles are presented. The data obtained is found to be consistent with both Rayleigh scattering data and calculated values. The measurements have a spatial resolution of better than 1 mm, and uncertainties of less than 5%.
