Hydrodynamics Instability in Cone-guided Implosion for Fast Ignition

The fast ignition scheme is one of the most fascinating and feasible ignition schemes for the inertial fusion energy. Fast Ignition Realization Experiment phase one (FIREX-I) program has been carried out at ILE Osaka since 2003. In the program, the most significant challenge is to heat the high-density DT fuel plasma which is imploded by the GXII laser system using non- spherical cryogenic target. Even though this cone-guided implosion process has been studied experimentally and computationally for a few years, it has some unsolved problems which must be solved before the experiments. In this paper, a computational study of those implosion physics and target design for FIREX-I experiment is discussed. In this work, we estimate the affect of RT instability of mode 4~32 which is perturbed on the shell target initially. Considering this result, we design the target structure and laser pulse shape for the FIREX-I experiment, and evaluate the formation of fuel core plasma quantitatively. This work was supported by JSPS (15GS0214).