Hydrodynamics of foam cryogenic-deuterium target.

Hydrodynamic performance such as shock generation, compression, and target acceleration as well as energy transport including preheating of rear surface were investigated at Gekko-HIPER laser-irradiation system at ILE, Osaka. Cryogenic liquid deuterium target contained in a low-density plastic foam plane was irradiated with a 527-nm foot pulse and a 527-nm main-drive pulse. Hydrodynamics were well in good agreement with 1D simulations with Fokker-Planck electron transport. Rear surface temperature was found to be not significantly but slightly higher than the code prediction, indicating a possibility of target preheating due to energy transport that is not included in the code.