全部文献期刊会议图书|学者科研项目
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作者:Y. Nagashima , A. Ejiri ...
来源:[J].Fusion Engineering and Design(IF 0.842), 2019, Vol.146, pp.1149-1152
摘要:Abstract(#br)New polarizer and launcher systems on a 28-GHz electron-cyclotron (EC) heating and current drive (HCD) system have been developed for non-inductive second-harmonic EC-plasma-current ramp-up in the QUEST spherical tokamak. A launcher system with two quasi-optical...
作者:... K. Kuroda , Y. Nagashima , K. Hanada
来源:[J].Fusion Engineering and Design(IF 0.842), 2019, Vol.146 (Pt B), pp.2567-2570
摘要:Abstract(#br)A high voltage DC power supply for the cathode of the 8.56 GHz CW klystron has been set up for electron cyclotron heating (ECH) in steady state tokamak operation on QUEST spherical tokamak. The power supply is equipped with an IGBT array and a reactor for fast s...
作者:Y. Nagashima , T. Onchi ...
来源:[J].Fusion Engineering and Design(IF 0.842), 2019, Vol.146 (Pt B), pp.2628-2631
摘要:Abstract(#br)In the EC-driven (8.2 GHz) steady-state plasma on QUEST, plasma current seems to flow in the open magnetic surface in the outside of the closed magnetic surface in the low-field region according to plasma current fitting method without taking equilibrium into account...
作者:Y. Nagashima , S. Kawasaki ...
来源:[J].Fusion Engineering and Design(IF 0.842), 2017
摘要:Abstract(#br)In the present RF-driven (ECCD) steady-state plasma on QUEST, the plasma current seems to flow in the open magnetic surface outside of the closed magnetic surface in the low-field region according to the plasma current fitting (PCF) method. The current in the open ma...
作者:Y. Nagashima , M. Hasegawa ...
来源:[J].Journal of Nuclear Materials(IF 1.211), 2015, Vol.463, pp.1087-1090
摘要:Abstract(#br)Hydrogen wall pumping is studied in steady state tokamak operation (SSTO) of QUEST with all metal plasma facing materials PFMs at 100 °C. The duration of SSTO is up to 820 s in fully non-inductive plasma. Global gas balance analysis shows that wall pumping at th...
作者:Y. Nagashima , O. Watanabe ...
来源:[J].Journal of Nuclear Materials(IF 1.211), 2015, Vol.463, pp.1084-1086
摘要:Abstract(#br)Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70% of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just after the discharge. The global recycling ratio ( R g ), defined as th...

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