Development of measurement method for warm dense matter toward material selection for fast ignition

To survey the optimum materials for fast ignition, we have introduced approaches by using pulsed-power experiment. To evaluate the electrical properties of warm dense matter (WDM) for insulator as a diamond-like-carbon (DLC), we have developed exploding wire compression method by using pulsed-power discharge. The results show that the voltage and current waveforms with and without coating DLC are different after the wire ablation. From the absorption spectroscopic measurement, the DLC temperature is estimated to be 9000 K. We have developed a two-dimensional magnetohydrodynamics code for understanding process of the strong magnetic field. The results indicate that the electrical conductivity of wire affects the generated magnetic field distribution. >From above experimental and numerical approaches, WDM properties are important to select material for fast ignition. (author)