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Proceedings Paper

Oxygen-iodine active medium with external production of iodine in a DC glow discharge
Author(s): Pavel Anatolievich Mikheyev; Valeriy N. Azyazov; Adrew V. Mezhenin; Nikolay I. Ufimtsev; Alexander A. Shepelenko; Anatoly I. Voronov; Nikolay V. Kupryaev; Sergey Yu. Pichugin; Mikhail V. Vorobyov
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Paper Abstract

Experiments with a flow cell apparatus imitating conditions of oxygen-iodine laser, equipped with a chemical jet singlet oxygen generator and an electric discharge iodine generator have been performed. I2 and CH3I in the flow of Ar were used as atomic iodine precursors. The distributions of the electronically excited species along the flow were examined detecting their optical emissions. A straightforward comparison of two methods of oxygen-iodine medium production - conventional, by means of I2 dissociation in the singlet oxygen flow and with iodine atoms produced externally in the electric discharge - was performed. It was found that stored electron energy lifetime had been about 30% longer, when iodine was produced from CH3I in the discharge, compared to the conventional I2 dissociation in the singlet oxygen flow. It was observed that maximums of the I(2P1/2) and I2(B) concentrations had shifted to the nozzle plane, when I2 in Ar carrier was subjected to the glow discharge, pointing to a nearly twofold increase in the I2 dissociation rate. Contrary to the known results for low iodine and singlet oxygen concentrations, squared dependence of the amplitude of the I2(B) luminescence maximum with I(2P1/2) concentration was observed in the dissociation region for both methods of iodine production.

Paper Details

Date Published: 8 May 2007
PDF: 7 pages
Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63460J (8 May 2007); doi: 10.1117/12.738061
Show Author Affiliations
Pavel Anatolievich Mikheyev, P.N. Lebedev Physical Institute (Russia)
Valeriy N. Azyazov, P.N. Lebedev Physical Institute (Russia)
Adrew V. Mezhenin, P.N. Lebedev Physical Institute (Russia)
Nikolay I. Ufimtsev, P.N. Lebedev Physical Institute (Russia)
Alexander A. Shepelenko, P.N. Lebedev Physical Institute (Russia)
Anatoly I. Voronov, P.N. Lebedev Physical Institute (Russia)
Nikolay V. Kupryaev, P.N. Lebedev Physical Institute (Russia)
Sergey Yu. Pichugin, P.N. Lebedev Physical Institute (Russia)
Mikhail V. Vorobyov, P.N. Lebedev Physical Institute (Russia)

Published in SPIE Proceedings Vol. 6346:
XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Dieter Schuöcker, Editor(s)

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