Study on the effect of hydrogen isotope on the formation of fusion plasma structure
| Project/Area Number |
25420897
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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 Institutes for Quantum and Radiological Science and Technology (2016)
Japan Atomic Energy Agency (2013-2015) |
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Principal Investigator |
URANO HAJIME 国立研究開発法人量子科学技術研究開発機構, 那珂核融合研究所 先進プラズマ研究部, 上席研究員(定常) (70391258)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 炉心プラズマ / Hモード / 水素同位体 / シャフラノフシフト / ELM / ペデスタル / プラズマ / JT-60 / JET / 周辺ペデスタル / 金属壁 |
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| Outline of Final Research Achievements |
In the H-mode plasmas where the confinement is improved by the edge transport barrier in tokamak devices, the influence of hydrogen isotope mass on the plasma confinement has been investigated. The large-scale correlation between the edge and core plasmas has also been quantified. The increase of hydrogen isotope mass leads to the confinement improvement because the increase of the Shafranov shift due to the larger core pressure at heavier isotope stabilizes the edge plasmas. Then, the effects of Shafranov shift and plasma shape on the edge plasma structure have been assessed using JET and JT-60U. In particular, the increase of core pressure at high triangualrity and low elongation resulted in the reduction of edge pressure gradient due to the destabilization of the pressure-driven mode whereas the wider pedestal was formed so that the edge pressure was kept high enough.
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Report
(5 results)
Research Products
(11 results)
