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Temperature measurements by coherent Rayleigh scattering

Xingguo Pan, Peter F. Barker, A. Meschanov, J. H. Grinstead, Mikhail N. Shneider, and Richard B. Miles

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Abstract

We demonstrate, for the first time to our knowledge, the utility of coherent Rayleigh scattering (CRS) for temperature measurements in low-density gases and weakly ionized plasmas by measuring the translational temperature of neutral argon in a glow discharge. By analysis of the near-Gaussian spectral profile of the CRS signal, we determine temperatures with an uncertainty of ≤3%. We also investigate the intensity range over which this simple Gaussian analysis can be used for temperature measurements and discuss its potential for gas diagnostics.

© 2002 Optical Society of America

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