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Proceedings Paper

Improved production of O2(a1delta) in capacitively coupled radio-frequency discharges
Author(s): J. W. Zimmerman; B. S. Woodard; J. T. Verdeyen; D. L. Carroll; T. H. Field; W. C. Solomon
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Paper Abstract

Experimental investigations of radio-frequency discharges in O2/He/NO mixtures in the pressure range of 1-100 Torr and power range of 0.1-1.2 kW have indicated that O2(a1Δ) production is a strong function of geometry, excitation frequency, pressure and diluent ratio. The goal of these investigations was maximization of both the yield and flow rate (power flux) of O2(a1Δ) in order to produce favorable conditions for application to an electric oxygen-iodine laser (EOIL). At lower pressures, improvements in yield are observed when excitation frequency is increased from 13.56 MHz. As pressure is increased, increasing excitation frequency in the baseline configuration becomes detrimental, and yield performance is improved by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O2(a1Δ), oxygen atoms, and discharge excited states are made in order to describe the discharge performance dependent on various parameters.

Paper Details

Date Published: 21 February 2008
PDF: 12 pages
Proc. SPIE 6874, High Energy/Average Power Lasers and Intense Beam Applications II, 68740C (21 February 2008); doi: 10.1117/12.773784
Show Author Affiliations
J. W. Zimmerman, Univ. of Illinois at Urbana-Champaign (United States)
B. S. Woodard, Univ. of Illinois at Urbana-Champaign (United States)
J. T. Verdeyen, CU Aerospace (United States)
D. L. Carroll, CU Aerospace (United States)
T. H. Field, CU Aerospace (United States)
W. C. Solomon, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 6874:
High Energy/Average Power Lasers and Intense Beam Applications II
Steven J. Davis; Michael C. Heaven; J. Thomas Schriempf, Editor(s)

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