Formation and heating dynamics of high-density core plasma in asymmetric implosion

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The Institute of Laser Engineering, Osaka University is promoting a project to show scientific feasibility of Fast Ignition laser fusion by using shell target with cone. Implosion with such cone becomes asymmetric with mode-number of 1. Purpose of this research is to investigate formation and heating dynamics of asymmetric implosion. Results are as follows.・ Ultra-fast x-ray imaging technique such as Multi-Imaging X-ray-Streak Camera and 2-Dimensional Sampling Image X-ray Streak Camera were developed and improved to enable to observe rapidly changing asymmetrically imploded core plasma.・ It was found that in asymmetric implosion of shell with cone a jet flow is formed prier to the formation of the imploded core and traverses toward the tip of the cone.・ 2D-simulation code was developed and well reproduced such asymmetric core and jet formation.・ Multi-channel neutron detector system was developed. Parameters of asymmetric core were measured by observing the primary and the secondary fusion reactions.・ Fusion-produced protons were measured with nuclear track detector CR-39.・ Fundamental study of hydrodynamics and heating of cryogenic deuterium target was started. Acceleration and transport was investigated and well reproduced with simulation code.