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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 18 — Jun. 20, 2002
  • pp: 3753–3762

Gas temperature measurements in weakly ionized glow discharges with filtered Rayleigh scattering

Azer P. Yalin, Yury Z. Ionikh, and Richard B. Miles  »View Author Affiliations


Applied Optics, Vol. 41, Issue 18, pp. 3753-3762 (2002)
http://dx.doi.org/10.1364/AO.41.003753


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Abstract

We report the first gas temperature measurements in plasmas to our knowledge obtained by filtered Rayleigh scattering (FRS). A narrow-linewidth Ti:sapphire laser is used as the illumination source, and a mercury filter provides strong suppression of elastic background. We perform measurements in weakly ionized glow discharges in pure argon and in an argon-plus-1%-nitrogen mixture. Where possible, we verify the FRS technique by comparing filtered measurements with unfiltered measurements. We present point measurements of axial temperature with uncertainties of less than 5%. We use a planar scheme to obtain radial temperature profiles with uncertainties of 10%.

© 2002 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(290.5870) Scattering : Scattering, Rayleigh
(300.0300) Spectroscopy : Spectroscopy
(350.2450) Other areas of optics : Filters, absorption
(350.5400) Other areas of optics : Plasmas

History
Original Manuscript: August 13, 2001
Revised Manuscript: January 11, 2002
Published: June 20, 2002

Citation
Azer P. Yalin, Yury Z. Ionikh, and Richard B. Miles, "Gas temperature measurements in weakly ionized glow discharges with filtered Rayleigh scattering," Appl. Opt. 41, 3753-3762 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-18-3753

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