Reviewed are the present status and future prospects of the IFE research at ILE, Osaka University. At ILE, the Gekko XII and the Peta Watt laser system have been operated for investigating the fast ignition, the relativistic laser plasma interactions and so on. In particular, the fast ignition experiments with cone shell target have been in progress. In the experiments, the imploded high density plasmas are heated by irradiating 500J level peta watt laser pulse. The thermal neutron yield is found to increase by three orders of magnitude by the peta watt laser injection into the cone shell target[1]. The coupling processes of the peta watt laser energy to the core of the plasma have also been studied by simulation and experiment. It is found that the heat flow in the cone is well organized by the cone geometry.
By the PIC simulations and the Fluid and Fokker Planck simulations, the spectrum of the realtivistic electrons on the dense plasma surface has been studied to show that it has energy two components which have 0.5MeV and 2MeV slope temperatures. For the given electron spectrum, the Fluid-Fokker Planck simulation predicted the heat deposition profile and the coupling efficiency.Those results are compared with the experimental results and predict that a few tens of kJ peta watt laser will ignite the imploded plasma of high areal density .
Toward the demonstration of fast ignition and burn, we started the construction of a 10kJ/10ps peta watt laser recently. The project is named Fast Ignition Realization Experiment-I(FIREX-I) which aims at significant fusion burn of DT cryogenic fuel.

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