Study for electric field dynamics accross H-mode transition in torus plasmas
Project/Area Number |
17K14898
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Nuclear fusion studies
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Research Institution | National Institute for Fusion Science |
Principal Investigator |
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Project Period (FY) |
2017-04-01 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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Keywords | プラズマ乱流 / 電場 / L-H遷移 / 帯状流 / 測地線音波 / 内部輸送障壁 / 水素同位体効果 / MHD揺動 / 反転磁気シア / 電場構造 / 乱流輸送 / LH遷移 / プラズマ物理 / 核融合 |
Outline of Final Research Achievements |
Experimental studies in magnetically confined torus plasmas aiming at clarifying background mechanism of electric field structure excitation were performed. In particular, experiments and data analyses were conducted for plasmas having different confinement magnetic field structure, such as TJ-II (Spain, CIEMAT), JFT-2M (Japan, JAIRI: former institute of QST), and LHD (Japan, National Institute for Fusion Science). In TJ-II, interaction between zonal flows and steady-state electric field was studied. In JFT-2M, excitation mechanism for geodesic acoustic mode (GAM) was clarified. In LHD, internal transport barrier (ITB) dynamics was studied and its formation mechanism and quenching manner were found.
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Academic Significance and Societal Importance of the Research Achievements |
核融合発電システムの社会実装のため、磁場閉じ込め核融合炉の開発が進められている。プラズマ物理の課題として、プラズマ輸送プロセスの定式化と、高温炉心プラズマ生成のための輸送抑制がある。このための手法として、プラズマが自発的に閉じ込めを改善する、閉じ込め遷移現象が着目されており、その制御のため背景物理機構の理解が望まれている。本研究では、閉じ込め遷移現象で核心的な役割を果たす電場の生成プロセスを明らかにしたものである。ケーススタディではあるが、様々な電場振動固有モードや、定常電場構造形成機構の実験的解明を行った。
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Report
(7 results)
Research Products
(61 results)
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[Journal Article] Quantification of turbulent driving forces for geodesic acoustic mode in JFT-2M tokamak2018
Author(s)
T. Kobayashi, M. Sasaki, T. Ido, K. Kamiya, Y. Miura, Y. Nagashima, K. Ida, S. Inagaki, A. Fujisawa, S.-I. Itoh, and K. Itoh
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Journal Title
Physical Review Letter
Volume: 120
Issue: 4
Pages: 045002-045002
DOI
NAID
Related Report
Peer Reviewed
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[Presentation] Quantitative evaluation of turbulent driving forces for the geodesic acoustic mode in the JFT-2M tokamak2018
Author(s)
T. Kobayashi, M. Sasaki, T. Ido, K. Kamiya, Y. Miura, Y. Nagashima, K. Ida, S. Inagaki, A. Fujisawa, S.-I. Itoh, and K. Itoh
Organizer
The 8th Asia-Pacific Transport Working Group (APTWG)
Related Report
Int'l Joint Research / Invited
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[Presentation] Density dependence of heat pulse transport property in LHD2018
Author(s)
T. Kobayashi, K. Ida, T. Ii Tsujimura, S. Inagaki, T. Tokuzawa, H. Tsuchiya, N. Tamura, H. Igami, Y. Yoshimura, S.-I. Itoh, K. Itoh
Organizer
The 45th European Physical Society Conference on Plasma Physics
Related Report
Int'l Joint Research
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[Presentation] Dynamics of turbulent particle flux across the L‐H transition in JFT‐2M tokamak2018
Author(s)
T. Kobayashi, K. Itoh, T. Ido, K. Kamiya, S.-I. Itoh, Y. Miura, Y. Nagashima, A. Fujisawa, S. Inagaki, and K. Ida
Organizer
The Workshop EFTSOMP 2018 - Workshop on Electric Fields, Turbulence and Self-Organization in Magnetized Plasmas
Related Report
Int'l Joint Research
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[Presentation] Experimental investigation of the L-H transition dynamics2018
Author(s)
T. Kobayashi, M. Sasaki, T. Ido, K. Kamiya, Y. Miura, Y. Nagashima, K. Ida, S. Inagaki, A. Fujisawa, S.-I. Itoh, and K. Itoh
Organizer
2nd Asia-Pacific Conference on Plasma Physics
Related Report
Int'l Joint Research / Invited
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[Presentation] ヘリオトロンJにおける中心部コ ヒーレント密度揺動の電子サイクロ トロン共鳴加熱に対する応答2018
Author(s)
小林達哉, 小林進二, X. X. Lu, 釼持尚輝, 居田克巳, 大島慎介, 山本聡, 門信一郎, 福田大貴, 長崎百伸, 岡田浩之, 南貴司, 大谷芳明, 水内亨
Organizer
日本物理学会2018年秋季大会
Related Report
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[Presentation] Turbulent particle flux suppression by radial electric field non-uniformity at edge transport barrier in JFT-2M tokamak2017
Author(s)
T. Kobayashi, K. Itoh, T. Ido, K. Kamiya, S.-I. Itoh, Y. Miura, Y. Nagashima, A. Fujisawa, S. Inagaki, K. Ida, and K. Hoshino
Organizer
The 7th Asia-Pacific Transport Working Group (APTWG)
Related Report
Int'l Joint Research
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[Presentation] Interaction of geodesic acoustic modes and turbulence in JFT-2M tokamak2017
Author(s)
T. Kobayashi, M. Sasaki, K. Itoh, T. Ido, K. Kamiya, S.-I. Itoh, Y. Miura, Y. Nagashima, A. Fujisawa, S. Inagaki, and K. Ida
Organizer
16th International Workshop on H-mode Physics and Transport Barriers
Related Report
Int'l Joint Research
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