The results of investigation of two plasma clouds interaction appearing at the laser irradiation of two different targets in
background gas atmosphere on the MKV-4 facility of the "Iskra-5" has been described. The experimental data are
compared with the results of the theoretical simulation.
The paper describes the oscillator of a compact laser facility designed for investigating the opportunities and methods of in-lab simulation of the radiation and hydrodynamic effects, which occur during Supernova shell dispersion. The oscillator is designed as a neodymium glass laser in the self-mode-locking regime. In order to provide mode locking, it is used a thin layer of the phototropic dye solution 3274γ. Selection from the oscillation train of single laser pulse is performed by the electro-optic Pockels cell with the DKDP crystal and multi-layer dielectric polarizer. The cavity dumping system is controlled by the electronic units. The duration of a single pulse at the oscillator output does not surpass 500 ps, while its energy reaches 1.5 mJ.
It is described the amplifier of a compact laser facility designed for investigating opportunities and methods of in-lab simulation of the radiation and hydrodynamic effects, which occur during Supernova shell dispersion. The amplifier is assembled as a 7-pass layout with spatial separation of the beams in one active element made from neodymium glass. In order to enhance the contrast of the laser pulse directed onto the target with a sophisticated design, an optical shutter is placed at amplifier input. The optical shutter is designed around an electro-optic deflector with the crystal LiTaO3 and a spatial filter. The electro-optic deflector is controlled with the electronic units using high voltage light-triggered silicon switches. The contrast of a single laser pulse at the amplifier output is ~ 104, while its energy reaches 1.8 J in case of the duration of not more than 500 ps.