A historical overview on the mechanism of the COIL kinetics

Salman Rosenwaks; Boris D. Barmashenko; Karol Waichman

doi:10.1117/12.878600

15 November 2010 A historical overview on the mechanism of the COIL kinetics

Salman Rosenwaks, Boris D. Barmashenko, Karol Waichman

Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 775106 (2010) https://doi.org/10.1117/12.878600
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria

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(²P_1/2) 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.

Citation Download Citation

Salman Rosenwaks, Boris D. Barmashenko, and Karol Waichman "A historical overview on the mechanism of the COIL kinetics", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775106 (15 November 2010); https://doi.org/10.1117/12.878600

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