全部文献期刊会议图书|学者科研项目
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作者:A. Fujisawa , H. Idei ...
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:A. Fujisawa , K. Matsuoka ...
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:A. Fujisawa , H. Idei ...
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...
作者:A. Fujisawa , Y. Nagashima ...
来源:[J].Journal of Nuclear Materials(IF 1.211), 2015, Vol.463, pp.428-431
摘要:Abstract(#br)Thermal probe with double function of thermocouples and Langmuir probe has been developed, and the initial data observed in far-SOL in QUEST is obtained. Heat flux of megawatt per square meters related to energetic electrons and sonic plasma flow in far-SOL have been...
作者:A. Fujisawa , H. Idei ...
来源:[J].Fusion Engineering and Design(IF 0.842), 2016, Vol.109-111, pp.1528-1533
摘要:Abstract(#br)In the present RF-driven (ECCD) steady-state plasma on QUEST ( B t = 0.25 T, R = 0.68 m, a = 0.40 m), plasma current seems to flow in the open magnetic surface outside of the closed magnetic surface in the low-field region according to plasma current fitting (PCF)...
作者:A. Fujisawa , H. Idei ...
来源:[J].Vacuum(IF 1.53), 2016, Vol.129, pp.178-182
摘要:Abstract(#br)Poloidal and radial distributions of the hydrogen flux, both atomic and ion, to the plasma facing materials (PFMs) are measured with four fixed and one movable PdCu membrane probes in the QUEST spherical tokamak. Direct information about hydrogen retention in th...
作者:A. Fujisawa , K. Hanada ...
来源:[J].Fusion Engineering and Design(IF 0.842), 2016, Vol.109-111, pp.1365-1370
摘要:Abstract(#br)As QUEST has a small central solenoid (CS), a larger Ohmic discharge current has been obtained when the plasma shifts to the inboard side. This tendency restricts a divertor operation to the smaller plasma current regime. As the inner divertor coil has a smaller mutu...
作者:A. Fujisawa , K. Itoh
来源:[J].Scientific Reports(IF 2.927), 2016, Vol.6 (1), pp.4-161
摘要:Abstract(#br)Turbulence and its structure formation are universal in neutral fluids and in plasmas. Turbulence annihilates global structures but can organize flows and eddies. The mutual-interactions between flow and the eddy give basic insights into the understanding of non...
作者:... M. Lesur , A. Fujisawa , K. Itoh
来源:[J].Scientific Reports(IF 2.927), 2016, Vol.6 (1)
摘要:Abstract(#br)The variety of scalar and vector fields in laboratory and nature plasmas is formed by plasma turbulence. Drift-wave fluctuations, driven by density gradients in magnetized plasmas, are known to relax the density gradient while they can generate flows. On the other ha...
作者:A. Fujisawa , S. Inagaki ...
来源:[J].Scientific Reports(IF 2.927), 2016, Vol.6 (1), pp.1408-1412
摘要:Abstract(#br)Self-regulation between structure and turbulence, which is a fundamental process in the complex system, has been widely regarded as one of the central issues in modern physics. A typical example of that in magnetically confined plasmas is the Low confinement mod...

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