The plasmochemical processes and dynamics of plasma breakdown in а volume discharge initiated bу hard UV radiation are analyzed. Thanks to the use of high- energy radiatiori quanta, it is possible to broaden the choice of readily ionizaЫe impurities. It is shown that it is expedient to use NH_3 and Хе to excite quasi- continuous discharge in CO_2 and СО laser media, respectively. The necessary photoionization pulse- repetition frequency is determined.
Scientific-Research Institute of Nuclear Physics