衝撃大電流放電による高温高密度プラズマ生成の基礎研究

概要

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The plasma, which is called the fourth state of the substance, is characterized high temperature and high conductivity. The plasma has been used in many applications sush as high current discharge tubes, fluorescent lamps, gas lasers, chemical processing, electrical discharge machining and nuclear fusion research. In early fusion research, high current Z-pinches were regarded as possible controlled nuclear fusion reactor. However, the magnetohydrodynamic instabilities occrred in the Z-pinch plasma column prevented successful plasma confinement. And other type of the plasma confinement systems such as tokamak sytem and inertial confinement system had been investigated. The plasma focus device developed as an asymmetric Z-pinch device can produce the high density and hightemperature plasma. In recent years, Z-pinch plasmas and focus plasamas are expected as unique sources of X-rays for lithography and X-ray microscopy, for pumping X-ray lasers, for neutron production. In this work, a plasma focus device was constructed at Fukushima National College of Technology. Optimaizaion of the discharge condition for the plasma focus device was invetigated by using 4 Rogowski coils. The high-temperature and high-dennsity focused plasma was successfully produced at charging voltage of 45 kV and filling gas 10 Torr H2.
福島工業高等専門学校の論文
2006-01-28