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Proceedings Paper

A historical overview on the mechanism of the COIL kinetics
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Paper Abstract

The kinetics of the chemical oxygen-iodine laser (COIL) has been studied alongside the technological efforts in COIL development. In particular, many efforts have been devoted to the study of the mechanism of I2 dissociation in the COIL medium. Since O2(a) is the energy reservoir of the COIL, it must be involved in the dissociation of I2. Therefore, understanding the dissociation mechanism may help in finding ways of minimizing the O2(a) consumption for dissociation and increasing the chemical efficiency of the laser. In the present paper previously suggested mechanisms of I2 dissociation are briefly overviewed and recent measurements and modeling of the gain and the power in supersonic COILs carried out in our laboratory are presented. Our studies employ both an analytical model and numerical calculations which are outlined in the present paper, with more details on the models given in a following paper by Barmashenko et al. To unravel the I2 dissociation mechanism we utilize kinetic-fluid dynamics three-dimensional modeling, where pathways involving the excited species I2(X, 10 ≤ v < 25), I2(X, 25 ≤ v ≤ 47), I2(A, A'), O2(X, v), O2(a, v), O2(b, v) and I(2P1/2) as intermediate reactants are included. Both the gain and the power studies show good agreement between calculations and experiments. We believe that future modeling should include the above pathways and additional pathways should be considered when additional kinetic data is available.

Paper Details

Date Published: 16 November 2010
PDF: 14 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775106 (16 November 2010); doi: 10.1117/12.878600
Show Author Affiliations
Salman Rosenwaks, Ben-Gurion Univ. of the Negev (Israel)
Boris D. Barmashenko, Ben-Gurion Univ. of the Negev (Israel)
Karol Waichman, NRCN (Israel)


Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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