Exited oxygen in glow discharge afterglow

Pavel Anatolievich Mikheyev; Alexander Anatolievich Shepelenko; Nikolay V. Kupryaev; Anatoly I. Voronov

doi:10.1117/12.350641

7 June 1999 Exited oxygen in glow discharge afterglow

Pavel Anatolievich Mikheyev, Alexander Anatolievich Shepelenko, Nikolay V. Kupryaev, Anatoly I. Voronov

Proceedings Volume 3612, Gas and Chemical Lasers and Intense Beam Applications II; (1999) https://doi.org/10.1117/12.350641
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

Since COIL was invented, an interest exists to produce singlet oxygen using techniques without dangerous chemicals. One possible solution is to employ a discharge in pure oxygen or in oxygen mixtures. Up to date, no discharge system has produced enough singlet oxygen to operate a laser, as it is necessary to provide a very high energy load in the discharge —up to 100 kJ/mol. However, several recent papers claim up to 15-20% of singlet oxygen yield. Glow discharge in a vortex flow is known to be extremely stable at high pressures and currents and, therefore, permits very high power load. Pure oxygen was exited in a vortex tube of 1 .5 cm diameter at the pressures of 2—15 ton in the DC glow discharge with the gap between electrodes of 1—8 cm. Exited oxygen concentrations of several percents in afterglow of a1? and b1? states were measured detecting emission at 1 .27 and 0.762 microns. Current density up to 1 .5 A/cm2 was achieved, that is more than order of magnitude larger that typical values for stationary discharge. The dependencies of exited molecules concentration on current, pressure for a number of different discharge geometry are represented.

Citation Download Citation

Pavel Anatolievich Mikheyev, Alexander Anatolievich Shepelenko, Nikolay V. Kupryaev, and Anatoly I. Voronov "Exited oxygen in glow discharge afterglow", Proc. SPIE 3612, Gas and Chemical Lasers and Intense Beam Applications II, (7 June 1999); https://doi.org/10.1117/12.350641

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