H. Sakagami, T. Nakamura, T. Johzaki, H. Nagatomo, Y. Nakao, T. Taguchi, K. Mima


Integrated Simulations and Respective Simulation Modeling for FIREX-I

Date of publication:

Oct. 2008

Key words:

21 IAEA Fusion Energy Conference, IF/P7-22


Integrated simulations for the fast ignition with a cone-guided target and 10[ps] heating laser have been performed to investigate the core heating property of FIREX-I experiments. It was found that the core reached higher average temperature when the preformed plasma on an inner surface of the cone tip had longer scale length. As the scale length of the preformed plasma was not easily controllable, a low-density foam coated target was proposed to prevent the reduction of the fast electron beam intensity during the laser irradiation. Optimum foam density and thickness were estimated by averaged core temperatures calculated by the integrated simulations. As respective simulation modeling, the cone angle and the laser spot size were optimized by 2D relativistic PIC simulations and a double-cone design was suggested. Simulations for 2D cone-guided nonspherical implosion were performed by the radiation-hydro code to preliminarily design targets, and the core heating simulations were performed by the relativistic Fokker-Planck code to estimate the magnetic field effect on the core heating.

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