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Proceedings Paper

New mechanism of O2(a1deltag) quenching in oxygen-contained plasmas
Author(s): O. V. Braginsky; A. N. Vasilieva; Konstantin S. Klopovsky; A. S. Kovalev; Dmitriy V. Lopaev; Yuri A. Mankelevich; N. A. Popov; T. V. Rakhimova; Alexander T. Rakhimov; Yuri V. Savin
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Paper Abstract

Singlet oxygen excitation in RF discharge at 13.56 MHz was studied experimentally and theoretically in the pressure range of 2 - 20 Torr. It was shown, that the saturation of O2(a1Δg) concentrations with input power at high oxygen pressures is due to quenching of O2(a1Δg) by atomic oxygen in three-body process. Removing of atomic oxygen using HgO coatings on the tube wall allows to remove saturation and to increase in three times the O2(a1Δg) concentrations at 15 Torr. The record values of singlet oxygen (SO) yield of about 10% are obtained for the first time in gas discharges at high oxygen pressures of 10 - 20 Torr.

Paper Details

Date Published: 23 March 2005
PDF: 5 pages
Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.610959
Show Author Affiliations
O. V. Braginsky, Moscow State Univ. (Russia)
A. N. Vasilieva, Moscow State Univ. (Russia)
Konstantin S. Klopovsky, Moscow State Univ. (Russia)
A. S. Kovalev, Moscow State Univ. (Russia)
Dmitriy V. Lopaev, Moscow State Univ. (Russia)
Yuri A. Mankelevich, Moscow State Univ. (Russia)
N. A. Popov, Moscow State Univ. (Russia)
T. V. Rakhimova, Moscow State Univ. (Russia)
Alexander T. Rakhimov, Moscow State Univ. (Russia)
Yuri V. Savin, Russian Federal Nuclear Ctr. (Russia)

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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