ИСТИНА

In the present talk we discuss specific features of the plasma channel created by the intense UV femtosecond laser pulse arising from its strong nonequilibrium. In particular, the photoelectron energy spectrum formed in the process of gas multiphoton ionization consists of a number of peaks corresponding to the absorption of a certain number of photons. Such an electron energy distribution function (EEDF) is characterized by the energy intervals with inverse population that can be used for amplification of radio-frequency electromagnetic radiation in a plasma media with certain energy dependence of the transport cross section