Crater formation in multicomponent polycrystalline targets under the action of a high-power laser

The formation of craters in multicomponent polycrystalline (andesite) targets and aluminium under the action of a high-power laser pulse with intensity 1012-1013 W/cm2 and wavelength 1,054 m is studied experimentally on Nd laser facility Saturn. For aluminum, the craters parameters conform satisfactorily to theoretical estimates based on the model of transformation of laser energy into shock wave energy in the ablation process on the target surface in the hydrodynamic interaction regime. For andesite targets, the calculated value is twice larger than the experimental one, which could be explained by andesite targets porosity.