29 March 1996 Effect of geometry and preionization conditions on the performance of atmospheric pressure HF chemical laser
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Abstract
Laser performance of an electric discharge, plasma cathode preionized, atmospheric pressure HF chemical laser was investigated and geometrically optimized. The preionization electron density was measured at atmospheric pressure in helium and in a mixture of SF6 + H2 diluted by helium. The measured preionization density is ne approximately equals 6.7 X 106 - 2 X 107 cm-3, which is higher than the minimum critical density required for a self-sustained, homogeneous discharge of atmospheric-pressure electro-negative gasses. We have found improvement in laser specific energy for a diluted gas mixture of SF6 + H2 due to reduction in SF6 concentration. The effects of inter-electrode gap height and plasma cathode grid width on laser performance were also investigated and will be reported.
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Yehoshua Y. Kalisky, Karol Waichman, S. Kamin, D. Chuchem, "Effect of geometry and preionization conditions on the performance of atmospheric pressure HF chemical laser", Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); doi: 10.1117/12.236869; https://doi.org/10.1117/12.236869
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