About the modeling of light beam self-focusing in plasma at the irradiation of the target by power UV laser

The peculiarities of light beam expansion in plasma upon irradiation condensed targets with a powerful UV laser pulse are studied the help mathematical modeling. Experiments were carried out at Lebedev Physical Institute Russian Academy Sciences use GARPUN installation: KrF that irradiated two-layer consisting aluminum foil and plexiglass layer. Channels stretched along direction incidence found bottom crater. It was shown on basis experimental calculated data selffocusing developed plasma. As result, hot spots produced vicinity critical density, fast (superthermal) electron flows generated. could produce channels plexiglas. In order to describe self-focusing effect physicalmathematical model developed, “FOCUS” program created Technological University (MIREA). Numerical simulations gas-dynamic profiles (linear exponential). thermal develop conditions “GARPUN” experiments (~ 1 mm longitudinal plasma, moderate radiation intensity: 10 11 –10 12 (W/cm 2 ) × µm ). parameters dangerous modes perturbations estimated. interest modelling results is related thermonuclear fusion (LTF) research. Although Nd glass lasers basic installations for LTF research, gas eximer have some advantages as drivers future reactors. interaction has peculiarities. Thus, developing physical-mathematical models creating new programs required interpretation modern – coupling design large scale facilities based topical problem.