The influence of the irradiation symmetry and the foam absorber on the target compression characteristics for the HiPER

The calculations and analysis of the target compression state are reported for the HiPER facility under deviation of the baseline target irradiation conditions from the completely symmetric conditions considered earlier. The irradiation asymmetry readily arises at a small number of irradiating laser beams (or the directions of irradiation, for example, two or 8-20 directions) if the targets are used in a thermonuclear reactor where the number of beams is limited. The calculations have been taken by the scheme proposed earlier, which includes plotting of the irradiation maps and histograms, 1D- and 2D simulations of the target irradiation and compression. The calculations of the foam absorber targets have been compared to the experiments on the plane target irradiation at the LIL facility, where the absorber size and the irradiation conditions are in agreement with the conditions necessary for the HiPER facility.