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Development of plasma response simulation code against three-dimensional magnetic field in tokamaks

Research Project

Project/Area Number 19K14696
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Inoue Shizuo  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) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords誤差磁場 / 磁気島 / 平衡制御 / 抵抗性壁モード / ロックトモード / MHD / トカマク / ディスラプション
Outline of Research at the Start

トカマク型の核融合炉は理想的には軸対称装置であるが、コイル・導体壁が製作・設置の過程で僅かに歪むと、コイル電流・渦電流により非軸対称な“誤差磁場”が生じる。装置の実形状性により生じる誤差磁場が計算可能な平衡制御コードと、二流体的なプラズマの応答による誤差磁場の遮蔽/浸透率が計算可能な電磁流体(MHD)コードを連携計算する統合コードを開発する。また、開発したコードは信頼性向上の為、中型(DIII-D)・大型(JT-60SA)トカマク装置の実験結果と相互検証する。最終的に、トカマク炉の誤差磁場に対する裕度を評価し、建設コスト削減に貢献することを目指す。

Outline of Final Research Achievements

This research objective is to explore locked modes, which is a major cause of plasma disruption in the tokamak devices and is caused by error fields that stem from the errors of the installation and construction of devices. The AEOLUS-IT code predict the plasma response against the error field, which is validated by the experiment in the DIII-D in US. The key result is the multi-hierarchy response between the external field and the internal magnetic island, which was reported in the IAEA Fusion Energy conference and is published in Nuclear Fusion Journal. Furthermore, we found the new stabilization scheme of the magnetic island by the external magnetic field by exiting the resonant oscillation of the magnetic island, which can be considered as energy cascade and was reported in the American Physics Conference.

Academic Significance and Societal Importance of the Research Achievements

プラズマはそれ自身の回転により誤差磁場を遮蔽するが、誤差磁場は装置壁に流れる渦電流やコイルの非軸対称により生じ、その遮へいはプラズマの非線形的な振る舞いにより生じる。本研究では遮蔽・浸透の多階層的な物理を明らかにするとともにトカマク型装置における誤差磁場の許容値緩和により原型炉の建設コスト削減に貢献しうる、新しいロックトモード回避手法を提案した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2019

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results) Presentation (4 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] A new vertical instability predictor via precursor oscillation detection with performance monitoring of equilibrium controller2022

    • Author(s)
      Inoue Shizuo、Miyata Yoshiaki、Urano Hajime、Suzuki Takahiro
    • Journal Title

      Nuclear Fusion

      Volume: - Issue: 8 Pages: 086007-086007

    • DOI

      10.1088/1741-4326/ac6c39

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Non-Resonant n = 1 Helical Core Induced by m/n = 2/1 Neoclassical Tearing Mode in JT-60U2021

    • Author(s)
      BANDO Takahiro、INOUE Shizuo、SHINOHARA Kouji、ISAYAMA Akihiko、WAKATSUKI Takuma、YOSHIDA Maiko、HONDA Mitsuru、MATSUNAGA Go、TAKECHI Manabu、OYAMA Naoyuki、IDE Shunsuke
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 1402030-1402030

    • DOI

      10.1585/pfr.16.1402030

    • NAID

      130008022665

    • ISSN
      1880-6821
    • Year and Date
      2021-03-12
    • Related Report
      2020 Research-status Report
  • [Journal Article] Development of JT-60SA equilibrium controller with an advanced ISO-FLUX control scheme in the presence of large eddy currents and voltage saturation of power supplies2021

    • Author(s)
      Inoue S.、Miyata Y.、Urano H.、Suzuki T.
    • Journal Title

      Nuclear Fusion

      Volume: 61 Issue: 9 Pages: 096009-096009

    • DOI

      10.1088/1741-4326/ac1260

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calculation of diamagnetic β and l by using Cauchy Condition Surface scheme2021

    • Author(s)
      Inoue Shizuo
    • Journal Title

      Fusion Engineering and Design

      Volume: 168 Pages: 112401-112401

    • DOI

      10.1016/j.fusengdes.2021.112401

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A new stabilizing regime of tearing mode entrainment in the presence of a static error field2019

    • Author(s)
      Okabayashi M.、Inoue S.、Logan N.C.、Taylor N.Z.、Strait E.J.、de Grassie J.、Ferraro N.、Hanson J.、Jardin S.、La Haye R.J.、Liu Y.Q.、Paz-Soldan C.、Sugiyama L.、Wingen A.
    • Journal Title

      Nuclear Fusion

      Volume: 59 Issue: 12 Pages: 126015-126015

    • DOI

      10.1088/1741-4326/ab37d2

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reconnection heating experiments and simulations for torus plasma merging startup2019

    • Author(s)
      Ono Yasushi、Inoue Shizuo、Tanabe Hiroshi、Cheng Chio-Zong、Hara Hirohisa、Horiuchi Ritoku
    • Journal Title

      Nuclear Fusion

      Volume: to be published Issue: 7 Pages: 076025-076025

    • DOI

      10.1088/1741-4326/ab14a4

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 改良した等磁束制御手法による JT-60SA平衡制御コントローラーの開発2019

    • Author(s)
      井上静雄,宮田良明,浦野創,鈴木隆博
    • Organizer
      第 36 回 プラズマ・核融合学会 年会
    • Related Report
      2019 Research-status Report
  • [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
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] MHD Properties of Tearing Stabilized Regime by Rotating External 3d Field in the Presence of Error Field2019

    • Author(s)
      M. Okabayashi, S. Inoue, N. Logan, Z. Wang, Z. Taylor, E. Strait, R. La Haye, J. Hanson, D. Shiraki
    • Organizer
      61st Annual Meeting of the APS Division of Plasma Physic
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] “A promising path of Tearing Mode Entrainment in the Presence of Static Error Field2019

    • Author(s)
      M. Okabayashi, S. Inoue, N. Logan, Z. Wang, Z. Taylor, E. Strait, R. La Haye, J. Hanson, D. Shiraki,
    • Organizer
      23rd Workshop on MHD Stability Control
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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