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Proceedings Paper

Experimental effects of atomic oxygen on the development of an electric discharge oxygen iodine laser
Author(s): David L. Carroll; Joseph T. Verdeyen; Darren M. King; J. W. Zimmerman; J. K. Laystrom; B. S. Woodard; G. F. Benavides; K. Kittell; Wayne C. Solomon
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Paper Abstract

As the development of the electric discharge iodine laser continues, the role of oxygen atoms downstream of the discharge region was found to be very significant. One of the largest uncertainties is the rate of the quenching of I* by O atoms. We have taken a series of measurements of O2(1Δ) emission, I* emission, O-atom titrations, gain/absorption, and O2(1Δ) yield to explore the significant positive and negative roles that O atoms play in the kinetics of the system that influence the gain. An estimate of the reaction rate for I* + O is provided. This investigation of the effects of atomic oxygen led to the measurement of positive gain on the 1315 nm transition of atomic iodine where the O2(a1Δ) was produced in a flowing electric discharge. Excess atomic oxygen was scavenged by NO2 to minimize the deleterious effects. The discharge production of O2(a1Δ) was enhanced by the addition of a small proportion of NO to lower the ionization threshold of the gas mixture. The electric discharge was followed by a continuously flowing supersonic cavity, which was employed to lower the flow temperature.

Paper Details

Date Published: 23 March 2005
PDF: 6 pages
Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611031
Show Author Affiliations
David L. Carroll, CU Aerospace (United States)
Joseph T. Verdeyen, CU Aerospace (United States)
Darren M. King, CU Aerospace (United States)
J. W. Zimmerman, CU Aerospace (United States)
J. K. Laystrom, CU Aerospace (United States)
B. S. Woodard, Univ. of Illinois/Urbana-Champaign (United States)
G. F. Benavides, Univ. of Illinois/Urbana-Champaign (United States)
K. Kittell, Univ. of Illinois/Urbana-Champaign (United States)
Wayne C. Solomon, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 5777:
XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Jarmila Kodymova, Editor(s)

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