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Proceedings Paper

Spectroscopic studies of a prototype electrically pumped COIL system
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Paper Abstract

This paper discusses methods, using non-intrusive diagnostic techniques, to characterize the detailed dynamics of I* gain and O2(a1Δ) yield on a laboratory microwave-discharge flow reactor, for conditions relevant to the electrically driven COIL concept. The key diagnostics include tunable diode laser absorption measurements of I* small-signal gain and temperature, high-precision absorption measurements of reactor I2 concentrations, absolute and relative spectral emission measurements of O2(a1Δ) and I* concentrations, and air-afterglgow determinations of O concentrations. We have characterized variations in O and O2(a) yields with discharge power and oxygen mole fraction. We observe O2(a) yields to increase dramatically with decreasing oxygen mole fraction. We have also demonstrated a spectral fitting analysis technique capable of quantifying the presence of vibrationally excited O2(a,v). This combined suite of diagnostics offers a comprehensive approach to performance characterization for electrically driven COIL concepts.

Paper Details

Date Published: 11 May 2004
PDF: 12 pages
Proc. SPIE 5334, Gas and Chemical Lasers, and Applications III, (11 May 2004); doi: 10.1117/12.537751
Show Author Affiliations
W. Terry Rawlins, Physical Sciences Inc. (United States)
Seonkyung Lee, Physical Sciences Inc. (United States)
William J. Kessler, Physical Sciences Inc. (United States)
David B. Oakes, Physical Sciences Inc. (United States)
Lawrence G. Piper, Physical Sciences Inc. (United States)
Steven J. Davis, Physical Sciences Inc. (United States)

Published in SPIE Proceedings Vol. 5334:
Gas and Chemical Lasers, and Applications III
Steven J. Davis; Michael C. Heaven, Editor(s)

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