• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on the instability of the high-performance plasma with strong reversed shear

Research Project

Project/Area Number 17K07003
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Takechi Manabu  国立研究開発法人量子科学技術研究開発機構, 那珂研究所 トカマクシステム技術開発部, 上席研究員 (40370423)

Co-Investigator(Kenkyū-buntansha) 井上 静雄  国立研究開発法人量子科学技術研究開発機構, 那珂研究所 先進プラズマ研究部, 主任研究員 (80757956)
Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords核融合プラズマ / 磁気流体不安定性 / 負磁気シアプラズマ / ディスラプション / 内部輸送障壁 / トカマク / 炉心プラズマ / MHD不安定性
Outline of Final Research Achievements

The high-performance plasma with strong reversed shear has a very high confinement and achieved a world record value of equivalent fusion multiplication factor. It also has large advantage to steady-state plasma operation because it has large self-generated current fraction. It contributes to the size reduction of the device and can accel the realization of a fusion power plant. However it isn’t consider as the main scenario of the future fusion DEMO and the plant because, even in the low beta regime, it has a frequent small disruption and finally terminated by major disruption. In this research, the cause of these low-beta disruptions were studied and some of them were identified.

Academic Significance and Societal Importance of the Research Achievements

本研究により、負磁気シアプラズマの多くの崩壊の原因となる不安定性の同定が可能となった。強負磁気シアプラズマが将来の炉において適用可能となることは炉設計に対して大きなインパクトを与える。喫緊ではHモードのELMによるダイバータへの過大な熱負荷が最大の問題となっているが、負磁気シアプラズマによる運転が可能であれば、ELMの無いLモードで炉が成立する可能性がある。また、自発電流が多い自己加熱プラズマが安定解をどこで持つのかは自明ではなく、電流ホールを持つような強負磁気シアプラズマになる可能性も否定できないが、この場合においても安定な放電が可能となることが期待される。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2021 2019 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] On Collapses in Strong Reversed Shear Plasmas During or Just After Plasma Current Ramp-Up in JT-60U2021

    • Author(s)
      BANDO Takahiro、TOJO Hiroshi、TAKECHI Manabu、AIBA Nobuyuki、WAKATSUKI Takuma、YOSHIDA Maiko、INOUE Shizuo、MATSUNAGA Go
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 1402089-1402089

    • DOI

      10.1585/pfr.16.1402089

    • NAID

      130008064609

    • ISSN
      1880-6821
    • Year and Date
      2021-07-05
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Disruption simulations for JT-60SA design and construction2019

    • Author(s)
      M. Takechi, S. Sakurai, K. Masaki, G. Matsunaga, A. Sakasai
    • Journal Title

      Fusion Engineering and Design

      Volume: 印刷中

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Progress of the magnetic sensor development for JT-60SA2017

    • Author(s)
      M. Takechi, G. Matsunaga, S. Sakurai, T. Sasajima, J. Yagyu, Y. Kawamata, K. Kurihara, K. Nakamura,
    • Journal Title

      Fusion Engineering and Design

      Volume: 123 Pages: 965-968

    • DOI

      10.1016/j.fusengdes.2017.03.010

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] The physics of locked tearing mode stabilization by rotating 3D fields in the presence of static error fields2019

    • Author(s)
      S. Inoue, M. Okabayashi, Z. Taylor, E.J. Strait, J. Shiraishi, G. Matsunaga, M. Takechi, A. Isayama, N. Hayashi, S. Ide
    • Organizer
      61st Annual Meeting of the APS Division of Plasma Physics, FL, USA, Oct. (2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Physical Process of Locked-Tearing Mode Control by 3D Magnetic Field Entrainment with Static Error Fields2019

    • Author(s)
      M. Okabayashi, 井上 静雄, E. Strait, Z. Taylor, C. Paz-Soldan, J. de Grassie, N. Ferraro, J. Hanson, S. Jardin, R. La Haye, N. Logan
    • Organizer
      27th IAEA Fusion Energy Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] NONLINEAR DYNAMICS OF TEARING MODE DRIVEN BY STATIC AND ROTATING EXTERNAL 3D FIELDS2019

    • Author(s)
      井上 静雄, Michio Okabayashi, Zane Taylor, Edward J. Strait, 白石 淳也, 武智 学, 松永 剛, 諫山 明彦, 林 伸彦, 井手 俊
    • Organizer
      27th IAEA Fusion Energy Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 共鳴磁場摂動によるロックトモード安定化の物理過程2019

    • Author(s)
      井上 静雄, 白石 淳也, 武智 学, 松永 剛, 諫山 明彦, 林 伸彦, 井手 俊介
    • Organizer
      日本物理学会 第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 外部共鳴磁場摂動による磁気島振動の能動制御とその磁気島成長に対する安定化効果2018

    • Author(s)
      井上 静雄, 白石 淳也, 武智 学, 松永 剛, 諫山 明彦, 林 伸彦, 井手 俊介
    • Organizer
      第35回プラズマ・核融合学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Tearing Mode Locking Avoidance by Applying Rotating External 3D Field2018

    • Author(s)
      M. Okabayashi, S. Inoue, T. Strait, Z. Taylor, N. Ferraro, N. Logan, S. Jardin
    • Organizer
      60th Annual Meeting of the APS Division of Plasma Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 三次元回転磁場によるロックトモード解放の物理過程2018

    • Author(s)
      井上 静雄、白石 淳也、武智 学、松永 剛、諫山 明彦、林 伸彦、井手 俊介、岡林 典男、Edward J. Strait、Nicholas Zane Taylor
    • Organizer
      日本物理学会 第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Optimization of Magnetic Sensor Configuration for JT-60SA Plasma Control2017

    • Author(s)
      Manabu Takechi, Mitsuhiro Suzuki, Yoshiaki Miyata, Kenichi Kurihara, Takahiro Suzuki, Shunsuke Ide
    • Organizer
      The joint meeting of the 26th International Toki Conference (ITC-26) and The 11th Asia Plasma and Fusion Association Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2017-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi