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Research on dynamical response of transport barrier in magnetically-confined plasma

Research Project

Project/Area Number 21K03513
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionChubu University

Principal Investigator

Itoh Kimitaka  中部大学, その他の部局, 顧問 (50176327)

Co-Investigator(Kenkyū-buntansha) 神谷 健作  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 (60360426)
佐々木 真  日本大学, 生産工学部, 准教授 (70575919)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords輸送障壁発生機序 / 大域的弾道的熱輸送 / 乱流の捕捉 / リミットサイクル / 崩壊現象 / MHDモード・リミットサイクル / 乱流構造 / 磁化プラズマ / 輸送障壁 / 動的応答 / 強相関乱流
Outline of Research at the Start

本研究では、磁化閉じ込めプラズマの輸送障壁の動的応答の代表的現象として、特に(a)L-H遷移、(b) 内部輸送障壁の形成機構、さらには(c)H-モード輸送障壁の自律的変動、に関わる動的応答を対象に選ぶ。これらの対象に、最新のプラズマ乱流理論「強相関乱流」の展開を応用する。こうした方法論によって、未解決の諸問題(例えば、L-H遷移での二段階遷移や遅い遷移、内部輸送障壁の発生動態、そしてH-モード障壁でのedge-harmonic oscillation (EHO)や中規模のedge-localized modes (ELM))に理解を与えモデルを検証する。

Outline of Final Research Achievements

Research has been conducted aiming at to present an understanding of dynamical responses of various transport barriers in magnetically-confined plasmas. Method of multiferroic turbulence was applied. As examples, the edge transport barrier of H-modes (H-TB) and the internal transport barriers (ITB) were chosen.
Investigations on H-TB has clarified the mechanism of limit cycle dynamics to appear, which was confirmed by experimental observations. More importantly, it was discovered that some of the abrupt decay of H-TB, i.e., the edge-localized mode (ELM), is triggered by tearing mode. For ITB, a new picture of formation/decay mechanisms was presented with quantitative confirmation by experimental observations: the disappearance of avalanche leads to the ITB formation. These discoveries renew the conventional pictures of dynamics of transport barriers in magnetically-confined plasmas.

Academic Significance and Societal Importance of the Research Achievements

不均一磁化プラズマは、太陽風などの自然現象として、また実験室でも磁場閉じ込め制御核融合をテーマに、世界中で研究されている。これらのプラズマに現れる輸送障壁の動的応答は、社会的にも学術的にも重要な未解決問題である。
学術的意義としては、こうした未解決問題の解明のために、ごく最近展開された強相関乱流理論の描像を応用する点である。その結果の一例であるが、H-モードの輸送障壁で、リミットサイクルや崩壊現象に新たな描像を提案し実験検証し、全く新たな描像を見出した。これらの成果は、輸送障壁の安定的保持を通じた核融合開発への寄与や、太陽風爆発への減災へ寄与など、社会的にも大きな意味を持つ。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (31 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (6 results) Journal Article (12 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 12 results,  Open Access: 5 results) Presentation (12 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Book (1 results)

  • [Int'l Joint Research] UCSD(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] マックスプランクプラズマ物理学研究所(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 西南物理学研究所/東華理工大学/西南交通大学(中国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UCSD(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Warwick University(英国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Institute for Plasma Research(インド)

    • Related Report
      2021 Research-status Report
  • [Journal Article] On the Role of Peeling?Ballooning Mode in Triggering the Type-I ELMs2024

    • Author(s)
      Itoh Kimitaka、Kamiya Kensaku
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 93 Issue: 2 Pages: 023501-023501

    • DOI

      10.7566/jpsj.93.023501

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Why the ELM-Control-Coils are Effective in Suppressing Type-I ELMs2024

    • Author(s)
      Itoh Kimitaka、Kamiya Kensaku
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 93 Issue: 2 Pages: 025001-025001

    • DOI

      10.7566/jpsj.93.025001

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of Turbulence Driven Particle Transport in PANTA by Using Multi-Field Singular Value Decomposition2023

    • Author(s)
      KODAHARA Takumi、SASAKI Makoto、KAWACHI Yuichi、JAJIMA Yuki、KOBAYASHI Tatsuya、YAMADA Takuma、ARAKAWA Hiroyuki、FUJISAWA Akihide
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 1202036-1202036

    • DOI

      10.1585/pfr.18.1202036

    • ISSN
      1880-6821
    • Year and Date
      2023-06-05
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of trapping finer-scale fluctuations in a solitary vortex in linear magnetized plasma2023

    • Author(s)
      Arakawa Hiroyuki、Sasaki Makoto、Inagaki Shigeru、Lesur Maxime、Kosuga Yusuke、Kobayashi Tatsuya、Kin Fumiyoshi、Yamada Takuma、Nagashima Yoshihiko、Fujisawa Akihide、Itoh Kimitaka
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 65 Issue: 11 Pages: 115002-115002

    • DOI

      10.1088/1361-6587/acfbb3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Impact of avalanche type of transport on internal transport barrier formation in tokamak plasmas2023

    • Author(s)
      Kin F.、Itoh K.、Bando T.、Shinohara K.、Oyama N.、Terakado A.、Yoshida M.、Sumida S.
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-023-46978-0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of 2D profile dynamics of electrostatic potential fluctuations using multi-scale deep learning2023

    • Author(s)
      Jajima Yuki、Sasaki Makoto、Ishikawa Ryohtaroh T、Nakata Motoki、Kobayashi Tatsuya、Kawachi Yuichi、Arakawa Hiroyuki
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 65 Issue: 12 Pages: 125003-125003

    • DOI

      10.1088/1361-6587/acff7f

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonlinear simulation of resistive drift waves in cylindrical magnetized plasmas in the presence of symmetry breaking particle source2023

    • Author(s)
      Sasaki M.、Kasuya N.、Kawachi Y.、Kobayashi T.、Nishizawa T.、Arakawa H.、Yamada T.、Fujisawa A.
    • Journal Title

      Physics of Plasmas

      Volume: 30 Issue: 8 Pages: 082302-082302

    • DOI

      10.1063/5.0150748

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of sawtooth heat pulses on edge flows and turbulence in a tokamak plasma2022

    • Author(s)
      ZHAO Kaijun、NAGASHIMA Yoshihiko、GUO Zhibin、DIAMOND Patrick H、DONG Jiaqi、YAN Longwen、ITOH Kimitaka、et al.
    • Journal Title

      Plasma Science and Technology

      Volume: 25 Issue: 1 Pages: 015101-015101

    • DOI

      10.1088/2058-6272/ac7c60

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experimental evaluation of avalanche type of electron heat transport in magnetic confinement plasmas2022

    • Author(s)
      Kin F.、Itoh K.、Bando T.、Shinohara K.、Oyama N.、Yoshida M.、Kamiya K.、Sumida S.
    • Journal Title

      Nuclear Fusion

      Volume: 63 Issue: 1 Pages: 016015-016015

    • DOI

      10.1088/1741-4326/aca341

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unveiling the structure and dynamics of peeling mode in quiescent high-confinement tokamak plasmas2021

    • Author(s)
      Kamiya Kensaku、Itoh Kimitaka、Aiba Nobuyuki、Oyama Naoyuki、Honda Mitsuru、Isayama Akihiko
    • Journal Title

      Communications Physics

      Volume: 4 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s42005-021-00644-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interactions of drift wave turbulence with streamer flows in wave-kinetic formalism2021

    • Author(s)
      Sasaki M.、Arakawa H.、Kobayashi T.、Kin F.、Kawachi Y.、Yamada T.、Itoh K.
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 10 Pages: 102304-102304

    • DOI

      10.1063/5.0059839

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Formation of density corrugations due to zonal flow in wave-kinetic framework2021

    • Author(s)
      Sasaki M.、Itoh K.、McMillan B. F.、Kobayashi T.、Arakawa H.、Chowdhury J.
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 11 Pages: 112304-112304

    • DOI

      10.1063/5.0055777

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 波動運動論と乱流構造形成2024

    • Author(s)
      佐々木真
    • Organizer
      第26回若手科学者によるプラズマ研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Reconsideration of ELMs2023

    • Author(s)
      Kimitaka Itoh
    • Organizer
      Edge Physics Forum at Max-Planck-Institute for Plasma Physics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Reconsideration of ELMs (Edge-Localized-Modes)2023

    • Author(s)
      Kimitaka Itoh, Kensaku Kamiya
    • Organizer
      7th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 巨視的電場存在下における帯状流・乱流相互作用2023

    • Author(s)
      佐々木真, 仲田資季, 小林達哉, 河内裕一, 西澤敬之, 伊藤公孝
    • Organizer
      プラズマ核融合学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 巨視的電場存在下における帯状流・乱流相互作用2023

    • Author(s)
      佐々木真, 仲田資季, 小林達哉, 河内裕一, 西澤敬之, 伊藤公孝
    • Organizer
      日本物理学会春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 波動運動論に基づく大域電場中の乱流・帯状流相互作用2022

    • Author(s)
      佐々木真、仲田資季、小林達哉、河内裕一、西澤敬之、伊藤公孝
    • Organizer
      閉じ込め輸送研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] トロイダルプラズマにおける帯状流による乱流塊の空間伝播・局在化現象2022

    • Author(s)
      佐々木真、仲田資季、伊藤公孝, B. F. McMillan, 小林達哉, 荒川弘之, J. Chowdhury
    • Organizer
      日本物理学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] トカマクプラズマの内部輸送障壁形成における雪崩的熱輸送の役割2022

    • Author(s)
      金史良、伊藤公孝、篠原孝司、坂東隆宏、神谷健作
    • Organizer
      日本物理学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 帯状流による階段状密度分布の形成2021

    • Author(s)
      佐々木真、伊藤公孝、B. F. McMillan, 小林達哉、荒川弘之、J. Chowdhury
    • Organizer
      物理学会秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 波動運動論による帯状流・乱流間相互作用2021

    • Author(s)
      佐々木真、伊藤公孝、B. F. McMillan, 小林達哉、荒川弘之、J. Chowdhury
    • Organizer
      閉じ込め・輸送研究会2021「プラズマの定量的予測と制御に向けたトロイダルプラズマの燃焼閉じ込め・輸送に関する研究」
    • Related Report
      2021 Research-status Report
  • [Presentation] Observations of bursty fluctuations measured by reflectometer associating to avalanche-like transport in JT-60U2021

    • Author(s)
      F. Kin, K. Itoh, T. Bando, K. Shinohara, N. Oyama, M. Yoshida, K. Kamiya, S. Sumida
    • Organizer
      Asia Pacific Transport Working Group
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] JT-60Uにおける突発的揺動と雪崩的熱輸送の観測2021

    • Author(s)
      金史良、伊藤公孝、坂東隆宏、篠原孝司、大山直幸、吉田麻衣子、神谷健作、隅田脩平
    • Organizer
      プラズマ核融合学会年会
    • Related Report
      2021 Research-status Report
  • [Book] プラズマ乱流輸送の基礎2023

    • Author(s)
      伊藤 早苗、伊藤 公孝
    • Total Pages
      206
    • Publisher
      岩波書店
    • ISBN
      9784000063449
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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