| Project/Area Number |
25420893
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
MORITA Shigeru 核融合科学研究所, ヘリカル研究部, 教授 (80174423)
GOTO Motoshi 核融合科学研究所, ヘリカル研究部, 准教授 (00290916)
KAWAMURA Gakushi 核融合科学研究所, ヘリカル研究部, 助教 (70509520)
DAI Shuyu 核融合科学研究所, ヘリカル研究部, 特任研究員 (50754686)
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| Research Collaborator |
FENG Yuehe マックスプランク研究所, 上級研究員
Xu Yuhong 西南物理研究所, 西南物理研究所, 教授
Dong Chunfeng 西南物理研究所, 准教授
SCHMITZ Oliver ウィスコンシン大学, 准教授
CORRE Yann カダラッシュ研究所
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 核融合 / ストキャスティック磁場 / 不純物輸送 / 分光計測 / 数値シミュレーション / 磁場閉じ込め核融合 / 高Z不純物 / 国際研究者交流 / アメリカ：ドイツ / 高Ｚ不純物 / 可視分光計測 / 国際研究者交流 ドイツ、アメリカ |
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| Outline of Final Research Achievements |
Transport properties of high Z (high atomic number) impurity in the edge stochastic magnetic layer have been investigated. Following results are obtained: Screening effects have been observed for different impurity species of Z numbers, Z=2, 6 and 26 (helium, carbon and iron). The current transport model needs a cross-field transport coefficient for impurity larger than the background plasma by a factor of 3 to 4. About 10% of first wall source should be considered to interpret the experimental results. Multi-machine comparison shows that the stochastic layer width should be larger than the impurity penetration length by a factor of 10 in order to realize effective impurity screening. Impurity flow velocity parallel to the magnetic field lines has been successfully measured, in which a clear correlation between the flow field and magnetic structure is identified. The result opens further possibility of detailed validation of the current transport model in future.
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