Search Results - "Ushigusa, K"
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1
Formation of advanced tokamak plasmas without the use of an ohmic-heating solenoid
Published in Physical review letters (23-01-2004)“…A new operational scenario of advanced tokamak formation was demonstrated in the JT-60U tokamak. This was accomplished by electron cyclotron and lower hybrid…”
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2
Current profile measurements with motional Stark effect polarimeter in the JT-60U tokamak
Published in Fusion engineering and design (01-03-1997)“…A motional Stark effect polarimeter with five viewing points has been installed to obtain current profiles in the JT-60U tokamak. Offset angles caused by…”
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3
Initial results of electron cyclotron range of frequency (ECRF) operation and experiments in JT-60U
Published in Fusion engineering and design (2001)“…The 110 GHz 1 MW electron cyclotron range of frequency (ECRF) system was designed and constructed on JT-60U to locally heat and control the plasmas. The…”
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Journal Article Conference Proceeding -
4
Evolution of lower-hybrid-driven current during the formation of an internal transport barrier
Published in Physical review letters (05-08-2002)“…Evolution of the lower-hybrid(LH)-driven current profile was measured during the formation of an internal transport barrier (ITB) in a reversed magnetic shear…”
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5
Design of the toroidal field coil for A-SSTR2 using high Tc superconductor
Published in Fusion engineering and design (01-11-2001)“…Advanced Steady State Tokamak Reactor2 (A-SSTR2) which meets both economical and environmental requirements, has been designed with the thermal fusion power of…”
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Journal Article Conference Proceeding -
6
Electron cyclotron resonance discharge cleaning by using LHRF system on JT-60U
Published in Fusion engineering and design (1999)“…Electron cyclotron resonance discharge cleaning (ECR-DC) has been studied on JT-60U in which the first wall is completely covered by graphite tiles. The radio…”
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7
Enhancement of absorption of lower hybrid wave by filling the spectral gap
Published in Physical review letters (24-10-1994)“…The interaction between a lower hybrid wave (LHW) and electrons in a plasma has been investigated. An LHW of low phase velocity was injected into a plasma in…”
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8
Vertical positional instability in JT-60SU
Published in Fusion engineering and design (01-02-1998)“…JT-60SU has been designed as an experimental device to establish an integrated scientific basis of steady-state tokamak operation. The high elongation of…”
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9
Vibration analysis in JT-60SU design
Published in Fusion engineering and design (01-11-2000)“…A dynamic analysis of the JT-60SU machine at emergency events such as an earthquake has been made. Superconducting coil systems and the vacuum vessel are…”
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Journal Article Conference Proceeding -
10
Observation of the limiter H mode in the JT-60 tokamak with lower-hybrid current drive
Published in Physical review letters (26-02-1990)“…The {ital H} mode was achieved in limiter discharges of a tokamak with lower-hybrid current drive for the first time. Simultaneous application of rf powers at…”
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11
Launcher heat load on high power LHCD experiments in JT-60U
Published in Journal of nuclear materials (01-04-1995)“…Heat loads on a lower hybrid wave launcher as well as on the first wall during high power auxiliary heating and their origin are investigated. It is found that…”
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12
Heat deposition on the first wall due to ICRF-induced loss of fast ions in JT-60U
Published in Journal of nuclear materials (01-04-1995)“…In JT-60U, the heat deposition on the first wall due to the ICRF-induced loss of fast ions was investigated by changing the position of the resonance layer in…”
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13
Interaction of lower hybrid wave with fast ions injected by neutral beam on the JT-60 tokamak
Published in Physical review letters (01-07-1991)“…The acceleration of beam ions due to their interaction with lower hybrid (LH) waves is investigated. The critical coupling density, above which the LH power is…”
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14
Physical design of JT-60 super upgrade
Published in Fusion engineering and design (01-05-1997)“…The JT-60 Super Upgrade (JT-60SU) is an upgraded tokamak device of JT-60U for developing the steady-state reactor and advanced tokamak operation in the…”
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15
Molecular cloning, expression, and characterization of a novel endo-a-N-acetylgalactosaminidase from Enterococcus faecalis
Published in Biochemical and biophysical research communications (31-10-2008)“…We report here the molecular cloning, expression and characterization of a novel endo-a-N-acetylgalactosaminidase, classified into the GH101 family, from…”
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16
Stationary multifaceted asymmetric radiation from the edge and improved confinement mode in a superconducting tokamak
Published in Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics (01-01-2002)“…Stationary multifaceted asymmetric radiation from the edge (MARFE) is studied by gas-puffing feedback control according to an empirical MARFE critical density…”
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17
Thermoluminescence and induced absorption in X-ray-irradiated CdS-doped glasses
Published in Journal of materials science (2008)“…Thermoluminescence of X-ray-irradiated CdS-doped glasses has been measured, and relation between thermoluminescence and induced absorption in the…”
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18
Design and fabrication of multijunction launcher on the JT-60
Published in IEEE Thirteenth Symposium on Fusion Engineering (1989)“…A multijunction-type launcher was installed on the JAERI (Japan Atomic Energy Research Institute) Tokamak-60 (JT-60). It is composed of 32 modules consisting…”
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Conference Proceeding -
19
Computational study on eddy current characteristics in a super conducting tokamak
Published in Fusion engineering and design (01-05-2002)“…Eddy currents in a super conducting (SC) tokamak were calculated in order to understand the characteristics of magnetic fields, electromagnetic (EM) forces and…”
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20
Simulation studies of plasma initiation and disruption in JT-60U
Published in Fusion engineering and design (01-03-1999)“…The plasma initiation and the disruption observed in JT-60U experiment are simulated by using TSPS (Toroidally Symmetric Plasma Simulation) code and EDDYCAL…”
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