[en] The papers presented at the symposium on 'Recent Progress of Pulsed Power Technology and its Application to High Energy Density Plasma' held on January 7-8, 2016 at National Institute for Fusion Science are collected. The papers in this proceeding reflect the present status and recent progress in the experimental and theoretical works on high power particle beams and high energy density plasmas produced by pulsed power technology. This issue is the collection of 20 papers presented at the entitled meeting. 19 of these presented papers are indexed individually. (J.P.N.)

[en] Triboluminescence is a luminous phenomenon resulted from friction; for example, peeling scotch tape, breaking rock sugar with a hammer, peeling mica and so on. Triboluminescence is well known over 50 years but in 2008 UCLA group reported the radiation of x-ray region by triboluminescence in vacuum for the first time. UCLA group made an automatic machine which peels scotch tape. With a view to practical application of triboluminescence to roentgen diagnosis we have attempted a new-type triboluminescence equipment. (author)

[en] We have been experimentally observed a terahertz (THz) radiation from laser created plasma by applying a transverse static electric field. Some theoretical models have been proposed, however, they are not enough to explain the phenomena of the plasma with the external electric field. We have developed new model to explain this phenomena and confirmed its validity by using 2D-PIC simulation. (author)

[en] The emission of laser plasma expanding along a magnetic nozzle has investigated by high temporal resolved spectroscopy in order to consider the possibility of control by a magnetic nozzle for laser ion source plasma. Changes in temporal distribution of plasma emission spectrum were observed in the various position, strength or shape of magnetic field. (author)

[en] This article reports basic properties of a prototype fullerene ion source that is being under development at Tokyo Tech. We adopt a sublimation electron irradiation method to ionize C₆₀ and successfully obtain a 1.6-nA negative fullerene beam. The results suggest that irradiated electron energy has a key to improve the ionization efficiency of fullerene. (author)

[en] Characterization of high energy ions was conducted to understand the acceleration mechanism of ions in the divergent gas-puff z-pinch. It was reconfirmed that there was also ion acceleration in the negative discharge. Comparison of ion acceleration in Ar and Kr discharges was carried out, and the maximum acceleration energy was almost the same. (author)

[en] We have developed a new type of a pulsed ion beam accelerator named 'bipolar pulse accelerator (BPA)' for improvement of the purity of the intense pulsed ion beam. The basic BPA system has two magnetically insulated acceleration gaps and is operated with the bipolar pulse. A prototype of the BPA system was developed and we have evaluated the pulsed ion beam accelerated in the 1st stage of the accelerator. The performance of the bipolar pulse generator was evaluated for the experiment on the 2nd stage acceleration of the pulsed ion beam. (author)

[en] Decomposition of dichloromethane (DCM) by discharge inside bubble in water is investigated. A gas injected discharge reactor is employed to achieve degradation with high energy efficiency. The reactor consists of a glass tube and a tungsten wire inserted into the glass tube, which is immersed in the water. The nanosecond pulsed high voltage generated by an inductive energy storage system pulsed power generator is applied to the tungsten wire to generate streamer discharge. Argon gas is injected into the glass tube to generate bubbles in the water. The experimental result shows that total organic carbon (TOC) and pH value decrease and chloride ion concentration increases by the discharge treatment. DCM is volatilized into the bubble, which is decomposed by hydroxyl radical produced by the discharge. (author)

[en] 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)

[en] Fundamental properties of a counter-facing plasma focus device were characterized. The plasma dynamics in the device, the out-put energy, the spectra from plasma, images of the plasma radiation, and the recovery rate of electrical insulation, were investigated using a proof-of-principle experimental device. All of the results indicated that the device has potentiality as a high average power extreme ultraviolet light source for the next generation lithography system. (author)