XeCl laser with an output energy 200 J

The parameters of an XeCl laser with a 25 cm  times; 25 cm aperture, excited by two oppositely directed electron beams, were calculated and determined experimentally. The energy of the output pulses of 250 ns duration at half-amplitude exceeded 200 J, the small-signal gain was g₀ = 0.065 cm^–1, and the unsaturated absorption coeffi-cient was α₀ = 0.015 cm^–1 for the optimal composition (Ar:Xe:HCl = 700:10:1) of the mixture at a total pressure of 2.5nbsp;bar. The laser efficiency, calculated relative to all the energy deposited in the active volume, was 3.0%.