Formation of a narrow beam from an excimer laser pumped by gamma rays

A laser pumped by a travelling gamma-radiation wave and consisting of a cylindrical part forming spontaneous superradiation and a conical amplifier is considered. The energy parameters of an excimer conical KrF amplifier are investigated. The factors influencing the divergence of induced radiation at the output of the conical amplifier are analysed for various durations of a pump pulse. It is shown that the divergence of radiation emitted by the laser with an active medium length of 10 m may be as high as 10^-4 rad. The scheme of laser-beam focusing on the target for the purposes of laser-induced fusion is considered.