Energy transport processes in dense plasmas heated with intense thermal x-rays

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Since 1982, collaborating with Max-Planck Institute of Quantum Optics in Germany, we have studying the physics of the generation of x-ray with lasers and its confinement in a cavity. We have made great progress on the measurement technique of absolute x-ray spectrum, the physics of radiation transport in high density plasmas and radiation hydropynamics. The confinement of the laser produced radiation in cavity has demonstrated and the Planck-radiation of 2.5Mega-degree Kelvin, which is the highest radiation temperature in laboratory, has achieved. In this fiscal year, the physics of the energy transport in high density plasmas produced by laser-produced x-ray, especially, propagation of radiation thermal wave, shock wave, and reemission are studied, and its industrial application is also investigated.From the view point of the industrial application of the high intense X-ray generation, the Japanese-German workshop on Femtosecond Lasers and High-Intensity Applications was organized by Institute of Laser Engineering, Osaka University and Max-Planck Institute of Quantum Optics. The main topics were as follows.(1) Femtosecond lasers in inertial confinement fusion(2) Harmonic generation from solid surfaces(3) Femtosecond laser development(4) Harmonic generation in gases(5) Pico-and femtosecond laser pulse propagation(6) Numerical simulation of relativistic laser-plasma interaction(7) Absorption of femtosecond laser pulses by solids(8) Coherent and incoherent x-rays and their diagnostics(9) Atomic physics in high intensity fieldTo investigate the project LASER2000 on Germany, and to know the status-quo of the laser application in industry, after the workshop, we have visited Hanover Technical University, Hanover Laser Center, Berlin Technical University, Max-Born Institute, and som industrial companies.