Journal
CONTRIBUTIONS TO PLASMA PHYSICS
Volume 53, Issue 7, Pages 549-559Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ctpp.201200114
Keywords
Escape factor; rf discharge in argon; metastable state; emission spectroscopy; TDLAS
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Funding
- Deutsche Forschungsgemeinschaft [SFB/TR 24]
- National Foundation for Science and Technology Development (NAFOSTED), Vietnam, [103.05-2012.20]
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Reabsorption of the emitted light in the plasma volume has recently been used for density measurements of the lower level of optical transition by interpretation of emission spectra employing the escape factor concept. Following this idea, we apply this method to a radio-frequency argon discharge. By revising the theoretical background, the impact of different assumptions on excited species spatial distributions is investigated. Comparing with 1s(5) and 1s(4) concentrations obtained with laser absorption spectroscopy, the range of applicability of those assumptions is analyzed at different discharge parameters. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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