| Project/Area Number |
13680559
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
プラズマ理工学
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| Research Institution | Kyushu University |
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Principal Investigator |
HANADA Kazuaki Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (30222219)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAMOTO Mizuki Kyushu University, Research Institute for Applied Mechanics, Associate Professor, 応用力学研究所, 助教授 (30235189)
ZUSHI Hideki Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (20127096)
NAKAMURA Kazuo Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (30117189)
HASEGAWA Makoto Kyushu University, Research Institute for Applied Mechanics, Instructor, 応用力学研究所, 助手 (00325482)
JOTAKI Eriko Kyushu University, Research Institute for Applied Mechanics, Associate Professor, 応用力学研究所, 助教授 (40211297)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Tokamak / current drive / energetic electrons / confinement / thermal input / lower hybrid wave / spectrum gap |
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| Research Abstract |
Steady state operation of tokamak is a key for the realization of cost-effective fusion power plant. TRIAM-1M (R=0.8m, a x b = 0.12 x 0.18m, B_t<8T) is positively tackled with the study of LH current drive The enhanced current drive (ECD) mode which accompanied with the improvement of energy confinement, could be observed.
The direct loss of passing energetic electrons may play an essential role in reduction of current drive efficiency. Therefore, the measurements of the confinement time of energetic electrons are important.
The absolute value of the prompt loss of energetic electrons was measured as the thermal input on the movable limiter located in the low field side of the plasma. In fact, the measurement was carried out in the plasma sustained by injected RF power of 65 kW and the estimated stored energy of energetic electron was about 500 J. The measured heat flux is about 0.5 kW and most of the thermal input to the movable limiter came from SOL plasma. In addition, ripple loss of energetic electron is enhanced in ECD mode.
This clearly shows that the improvement of the loss of energetic electrons does not play a significant role in the enhancement of current drive efficiency.
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