First-principle-based global simulation studies on turbulent transport and profile formations in burning plasmas
| Project/Area Number |
17K14899
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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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 |
Nakata Motoki 核融合科学研究所, ヘリカル研究部, 准教授 (40709440)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 燃焼プラズマ / 乱流輸送 / ゾーナルフロー / 連成大域計算 / 同位体効果 / プラズマ乱流 / 大域シミュレーション / 縮約モデル / 磁場構造 / プラズマ乱流輸送 / プラズマ・核融合 |
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| Outline of Final Research Achievements |
The aim of this study is to analyze the characteristics of turbulent transport and profile formation in multi-particle plasmas, which are essential for the steady-state maintenance of fusion burning. From a series of studies, new findings such as (1) influence of ion mass on turbulent transport (isotope effect), (2) magnetic field structure dependence on zonal flow generation, (3) microscopic instability analysis for isotope mixture plasmas in LHD experiments, (4) construction of an accurate reduced turbulent transport model for tokamak plasmas, (5 ), and (5) improvement of the efficiency of coupled global simulations. These results become fundamentals for the development and extension of the coupled global turbulence transport code, which consists of a system of macroscopic transport code and local gyrokinetic simulations.
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| Academic Significance and Societal Importance of the Research Achievements |
国際熱核融合実験炉(ITER)において核燃焼プラズマを達成し、その後の原型炉で持続的な核融合出力を実現するためには、電子や燃料イオン(D:重水素, T:三重水素)の温度分布に加え、各々の燃料イオン密度やHe灰分布、不純物分布等を高い精度で計測しつつ分布/加熱制御を確立することが不可欠となる。本研究によって、これらに対するいくつかの基盤的な知見が創出されている。特に、乱流輸送に関する同位体効果は40年以上にわたる未解決問題であり、その全容解明に資する理論的知見が得られた点や実験による検証が進展している点は、核融合科学・プラズマ物理学の進展に大きく貢献している。
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Report
(5 results)
Research Products
(51 results)
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[Journal Article] Extended investigations of isotope effects on ECRH plasma in LHD2019
Author(s)
Tanaka K、Nakata M、Ohtani Y、Tokuzawa T、Yamada H、Warmer F、Nunami M、Satake S、Tala T、Tsujimura T、Takemura Y、Kinoshita T、Takahashi H、Yokoyama M、Seki R、Igami H、Yoshimura Y、Kubo S、Shimozuma T、Akiyama T、Yamada I、Yasuhara R、Funaba H、Yoshinuma et al
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Journal Title
Plasma Physics and Controlled Fusion
Volume: 62
Issue: 2
Pages: 024006-024006
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Isotope effects on energy, particle transport and turbulence in electron cyclotron resonant heating plasma of the Large Helical Device2019
Author(s)
K. Tanaka, Y. Ohtani, M. Nakata, F. Warmer, T. Tsujimura, Y. Takemura, T. Kinoshita, H. Takahashi, M. Yokoyama, R. Seki, H. Igami, Y. Yoshimura, S. Kubo, T. Shimozuma, T. Tokuzawa, T. Akiyama, I. Yamada, R. Yasuhara, H. Funaba, M. Yoshinuma, K. Ida, M. Goto, et al
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Journal Title
Nuclear Fusion
Volume: 59
Issue: 12
Pages: 126040-126040
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD2017
Author(s)
Takahashi H., Nagaoka K., Murakami S., Osakabe M., Nakano H., Ida K., Tsujimura T. I., Kubo S., Kobayashi T., Tanaka K., Seki R., Takeiri Y., Yokoyama M., Maeta S., Nakata M. et al
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Journal Title
Nuclear Fusion
Volume: 57
Issue: 8
Pages: 086029-086029
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Predictions of toroidal rotation and torque sources arising in non-axisymmetric perturbed magnetic fields in tokamaks2017
Author(s)
M. Honda, S. Satake, Y. Suzuki, K. Shinohara, M. Yoshida, E. Narita, M. Nakata, N. Aiba, J. Shiraishi, N. Hayashi, G. Matsunaga, A. Matsuyama and S. Ide
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Journal Title
Nuclear Fusion
Volume: 57
Issue: 11
Pages: 116050-116050
DOI
Related Report
Peer Reviewed
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