Energy extraction measurements of an electron beam pumped, high Kr concentration KrF laser at elevated temperatures

Salesky, E. T.; Kimura, W. D.
October 1985
Applied Physics Letters;10/15/1985, Vol. 47 Issue 8, p774
Academic Journal
Energy extraction measurements are obtained with an electron beam pumped KrF laser for initial gas temperatures from 294 to 425 K. Gas mixtures investigated are 89.7% Ar/10% Kr/0.27% F2 at 1.23 amagats and 99.6% Kr/0.4% F2 at 0.81 amagats. These densities correspond to equivalent electron stopping powers and result in an average pump rate of ≊120 kW/cm3. Measured efficiencies do not increase significantly with temperature, in sharp contrast to earlier predictions. The Kr2F* fluorescence is monitored as a function of temperature, and lasing or nonlasing conditions. Although the Kr2F* fluorescence emission does decrease during lasing conditions indicating partial saturation of the molecule, the fluorescence also does not exhibit a strong temperature dependence. Computer simulations are in good agreement with the results when using an inverse square root temperature dependence for the Kr2F* formation.


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