K. Sakamoto

Learn More
A miniature and broadband, K-band p-HEMT LNA MMIC, that incorporates simple lumped matching elements and series bias topologies, has been developed for LMDS (Local Multi-point Distribution Service) and satellite communication. The gain and noise figure is 14.5 +/- 1.5 dB and 1.7 +/- 0.2 dB, respectively, at frequencies between 23 and 30 GHz. The die size of(More)
Japan Atomic Energy Agency as the JApan Domestic Agency (JADA) for ITER and the Domestic Agency of EU (EUDA) agreed the procurement sharing for the ITER NBI power supply system. The JADA contributes procurement of dc-1 MV ultra-high voltage (UHV) components such as a-1 MV dc generator, a transmission line and a-1 MV insulating transformer. The dc UHV(More)
Recent progress in the R&D and the design work of plasma heating and current drive (H&CD) technologies for ITER are described. The H&CD systems are composed of 20 MW electron cyclotron (EC), 20 MW ion cyclotron (IC) and 33 MW negative ion based neutral beam (N-NB) systems, and design and R&D work continues for plasma commissioning. Significant progress in(More)
Combined use of photocatalyst and adsorbent for the removal of inorganic arsenic(III) and organoarsenic compounds from aqueous media Characterization of eluent by hot water extraction of coals in terms of total organic carbon and environmental impacts Fuel, 84, pp.783-789 20055 Production of lactic acid by continuous electrodialysis fermentation with a(More)
Major issues of NBI power supplies are a high-speed switching, regulation and transmission of dc ultra high voltage, and suppression of surge energy input to the beam source at breakdown. A GTO(gate turn off thyristor) inverter type power supply where the control is performed at low voltage ac side was designed for the ITER NB. Based on the remarkable(More)
The effect of pulsed high electric field on viruses in liquid was studied. Swine vesicular disease virus (SVDV) and equine herpes virus-1 (EHV-1) were used in the experiment. Pulsed high voltage was applied repetitively to the converged electric field type electrode, which had an insulating plate with pinholes between parallel-plate electrodes. A pulsed(More)
  • 1