Modelling coil with iodine atoms produced by pulsed electric discharge

A. P. Napartovich; I. V. Kochetov; N. P. Vagin; N. N. Yuryshev

doi:10.1117/12.739337

26 April 2007 Modelling coil with iodine atoms produced by pulsed electric discharge

A. P. Napartovich, I. V. Kochetov, N. P. Vagin, N. N. Yuryshev

Proceedings Volume 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 634637 (2007) https://doi.org/10.1117/12.739337
Event: XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2006, Gmunden, Austria

Abstract

The pulse mode of operation of the chemical oxygen iodine laser (COIL) is attractive for a large body of new applications. Pulsed electric discharge is most effective to turn COIL operation into the pulse mode by instant production of iodine atoms. Numerical model is developed for simulations of the pulsed COIL initiated by electric discharge. The model comprises a system of kinetic equations for neutral and charged species, electric circuit equation, gas thermal balance equation, and the photon balance equation. Reaction rate coefficients for processes involving electrons are found by solving the electron Boltzmann equation, which is recalculated in a course of computations when plasma parameters changed. The processes accounted for in the Boltzmann equation include excitation and ionization of atoms and molecules, electron-ion recombination, electron-electron collisions, second-kind collisions, and stepwise excitation of molecules. The last processes are particularly important because of a high singlet oxygen concentration in gas flow from the singlet oxygen chemical generator. Results of numerical simulations are compared with experimental laser pulse waveforms. The conclusion is drawn about satisfactory agreement of the theory with the experiment. The mechanisms of iodine atoms production in the pulsed discharge are identified.

Citation Download Citation

A. P. Napartovich, I. V. Kochetov, N. P. Vagin, and N. N. Yuryshev "Modelling coil with iodine atoms produced by pulsed electric discharge", Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 634637 (26 April 2007); https://doi.org/10.1117/12.739337

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