Numerical analysis of formation of population inversion at the atomic iodine laser transition into molecular iodine-oxygen mixture exited with electrical discharge.

Detailed analysis of mixing kinetics in post-discharge plasma was carried out by using quasi-
two-dimensional diffusion model developed. Parametric study of chemical kinetics of mixing
flows indicated temperature to be the critical issue of population inversion. General heating
processes were found.
Lowering concentration of atomic oxygen was shown to be one of the main circumstances
reacting on iodine population inversion. Increase in pressure of excited oxygen flow was pointed
out to produce an inhomogeneous distribution of radial gain profile through the whole length of
mixing zone in such way of mixing.
Analysis of variation of molecular iodine concentration influence on temperature and gain
was carried out.
Increasing of the molecular iodine pre-dissociation prior to injection was shown to reduce
heat of gas admixture and so raise the gain.
This work was executed by support grant RFBF - N 06-02-16537 and НШ-133.2008.2.

Document number: 2008-3/839

Authors: E.A.Krilova, A.A.Chukalovsky, T.V.Rakhimova, K.S.Klopovsky


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