Kinetic studies for advanced iodine laser concepts

Jiande Han; Anatoly V. Komissarov; Scott P. Tinney; Michael C. Heaven; Steven J. Davis; Seonkyung Lee

doi:10.1117/12.611015

23 March 2005 Kinetic studies for advanced iodine laser concepts

Jiande Han, Anatoly V. Komissarov, Scott P. Tinney, Michael C. Heaven, Steven J. Davis, Seonkyung Lee

Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.611015
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

Abstract

Recent studies of the iodine dissociation mechanism for COIL systems have prompted new investigations of the energy transfer kinetics of O₂(b¹Σ⁺). Additional motivation for these studies, and for investigation of the quenching of I* by O atoms, is derived from efforts to build non-chemical singlet oxygen generators. Discharge generators produce relatively high concentrations of O₂(b) and O atoms. Dissociations of I₂ by the reagent streams from these generators will follow different kinetic pathways than those that are most important when the flow from a chemical generator is used. To improve our understanding of conventional COIL systems, and gain insights concerning the dissociation kinetics that will be relevant for discharge driven COIL devices we have examined the quenching of O₂(b) and O₂(a) by I₂, and the deactivation of I* by atomic oxygen. The primary findings are: (1) Quenching of O₂(b) by I₂ is fast (5.8x10^-11cm3 s^-1) with a branching fraction of 0.4 for the channel O₂(b)+I₂→O₂(a)+I₂. (2) The quantum yield for dissociation of I₂ by O₂(b) is relatively high (>0.5) and (3) The upper bound for the rate constant for quenching of I* by O atoms is k<2x10^-12cm³ s^-1.

Citation Download Citation

Jiande Han, Anatoly V. Komissarov, Scott P. Tinney, Michael C. Heaven, Steven J. Davis, and Seonkyung Lee "Kinetic studies for advanced iodine laser concepts", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.611015

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