New mechanism of O2(a1deltag) quenching in oxygen-contained plasmas

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

doi:10.1117/12.610959

23 March 2005 New mechanism of O₂(a¹Δ_g) quenching in oxygen-contained plasmas

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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Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.610959
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

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(a¹Δ_g) concentrations with input power at high oxygen pressures is due to quenching of O₂(a¹Δ_g) 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(a¹Δ_g) 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.

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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, and Yuri V. Savin "New mechanism of O₂(a¹Δ_g) quenching in oxygen-contained plasmas", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.610959

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