An experimental study was made of the energy characteristics of an XeCl laser pumped by a high-current proton beam which deposited energies up to 1 J/cm**3 in the gas mixture. The replacement of Ar (used as a buffer gas) with He increased the laser output energy and efficiency. The laser radiation energy obtained for a He:Xe:CCl//4 equals 750:50:1 mixture was 1. 5 J when the specific input energy was 15 J/liter and the lasing efficiency was 6%. ″Overheating″ of the mixture was observed at high input energies and this reduced the laser radiation energy and eventually quenched the lasing action.
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