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Proceedings Paper

Molecular singlet delta oxygen quenching kinetics in the EOIL system
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Paper Abstract

The development of a discharge oxygen iodine laser (DOIL) requires efficient production of singlet delta oxygen O21 Δ) in electric discharge. It is important to understand the mechanisms of of O2α1 Δ) quenching in these devices. To gain understanding of this mechanisms quenching of O2]1 Δ)in O/O2/O3/CO2/He mixtures has been investigated. Oxygen atoms and singlet oxygen molecules were produced by the 248 nm laser photolysis of ozone. The kinetics of O21 Δ) quenching were followed by observing the 1268 nm fluorescence of O2α1 Δ → X3 Σ transition. It is shown that vibrationally excited ozone O3(υ;) formed in the three-body recombination O + O2 + M →O3(υ) + M is an important O/O2/O3 quenching agent in O/O2/O3 systems. The process O3(υ ≥2) + O2(a1 Δ)→ 2O2 + O is the main O21 Δ) deactivation channel in the post-discharge zone. If no measures are taken to decrease oxygen atom concentration, the contribution of this process into overall O21Δ) removal is significant even in the discharge zone. It was found in experiment that addition of species that are good quenchers of O3(υ;) decrease O2(a1 Δ) deactivation rate in the O/O2/O3 mixtures.

Paper Details

Date Published: 3 February 2015
PDF: 10 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92551T (3 February 2015); doi: 10.1117/12.2064825
Show Author Affiliations
A. P. Torbin, Samara State Aerospace Univ. (Russian Federation)
P.N. Lebedev Physical Institute (Russian Federation)
P. A. Mikheyev, Samara State Aerospace Univ. (Russian Federation)
P.N. Lebedev Physical Institute (Russian Federation)
A. A. Pershin, Samara State Aerospace Univ. (Russian Federation)
P.N. Lebedev Physical Institute (Russian Federation)
A. V. Mezhenin, Samara State Aerospace Univ. (Russian Federation)
V. N. Azyazov, Samara State Aerospace Univ. (Russian Federation)
P.N. Lebedev Physical Institute (Russian Federation)
M. C. Heaven, Emory Univ. (United States)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

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