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Proceedings Paper

ElectricOIL discharge and post-discharge kinetics experiments and modeling
Author(s): Andrew D. Palla; J. W. Zimmerman; Brian S. Woodard; David L. Carroll; J. T. Verdeyen; Tyronne C. Lim; Wilson Terry Rawlins; Seonkyung Lee; Steven J. Davis; W. C. Solomon
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Paper Abstract

Laser oscillation at 1315 nm on the I(2P1/2) → I(2P3/2) transition of atomic iodine has been obtained by a near resonant energy transfer from O2(a1&Dgr;) produced using a low-pressure oxygen/helium/nitric-oxide discharge. In the electric discharge oxygen-iodine laser (ElectricOIL) the discharge production of atomic oxygen, ozone, and other excited species adds levels of complexity to the singlet oxygen generator (SOG) kinetics which are not encountered in a classic purely chemical O2(a1&Dgr;) generation system. The advanced model BLAZE-IV has been introduced in order to study the energy-transfer laser system dynamics and kinetics. Levels of singlet oxygen, oxygen atoms and ozone are measured experimentally and compared with calculations. The new BLAZE-IV model is in reasonable agreement with O3, O2(b1&Sgr;), and O atom, and gas temperature measurements, but is under-predicting the increase in O2(a1&Dgr;) concentration resulting from the presence of NO in the discharge. A key conclusion is that the removal of oxygen atoms by NOX species leads to a significant increase in O2(a1&Dgr;) concentrations downstream of the discharge in part via a recycling process, however there are still some important processes related to the NOX discharge kinetics that are missing from the present modeling. Further, the removal of oxygen atoms dramatically inhibits the production of ozone in the downstream kinetics.

Paper Details

Date Published: 14 February 2007
PDF: 12 pages
Proc. SPIE 6454, High Energy/Average Power Lasers and Intense Beam Applications, 64540I (14 February 2007); doi: 10.1117/12.717646
Show Author Affiliations
Andrew D. Palla, CU Aerospace (United States)
J. W. Zimmerman, Univ. of Illinois at Urbana-Champaign (United States)
Brian S. Woodard, Univ. of Illinois at Urbana-Champaign (United States)
David L. Carroll, CU Aerospace (United States)
J. T. Verdeyen, CU Aerospace (United States)
Tyronne C. Lim, Univ. of Illinois at Urbana-Champaign (United States)
Wilson Terry Rawlins, Physical Sciences Inc. (United States)
Seonkyung Lee, Physical Sciences Inc. (United States)
Steven J. Davis, Physical Sciences Inc. (United States)
W. C. Solomon, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 6454:
High Energy/Average Power Lasers and Intense Beam Applications
Steven J. Davis; Michael C. Heaven; J. Thomas Schriempf, Editor(s)

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