Effect of geometry and preionization conditions on the performance of atmospheric pressure HF chemical laser

Yehoshua Y. Kalisky; Karol Waichman; S. Kamin; D. Chuchem

doi:10.1117/12.236869

29 March 1996 Effect of geometry and preionization conditions on the performance of atmospheric pressure HF chemical laser

Yehoshua Y. Kalisky, Karol Waichman, S. Kamin, D. Chuchem

Author Affiliations +

Proceedings Volume 2702, Gas and Chemical Lasers; (1996) https://doi.org/10.1117/12.236869
Event: Photonics West '96, 1996, San Jose, CA, United States

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 n_e 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, and 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); https://doi.org/10.1117/12.236869

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