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

Numerical study on kinetic plasma dynamics in ergodic regions

Research Project

Project/Area Number 20K03912
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 InstitutionNational Institute for Fusion Science

Principal Investigator

Moritaka Toseo  核融合科学研究所, 研究部, 助教 (20554372)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsヘリカル型核融合炉 / ジャイロ運動論シミュレーション / 磁気島 / 水素同位体プラズマ / 非構造格子 / プラズマ輸送解析 / ジャイロ運動論モデル / 核融合炉周辺プラズマ / 同位体効果 / ヘリカル核融合炉 / 周辺輸送解析 / 径電場 / プラズマ輸送 / エルゴディック領域
Outline of Research at the Start

らせん状の大型コイルによって生成するトーラス状の磁力線によって燃焼プラズマを閉じ込めるヘリカル核融合炉は、核融合発電を実現するための有力な方法の一つである。ヘリカル核融合炉の周辺部分には、トーラス構造を持たない開いた磁力線が複雑に絡み合って存在しており、この領域での燃焼プラズマの振る舞いは明確にはなっていない。本研究では、プラズマのダイナミクスを詳細に調べるジャイロ運動論シミュレーションをヘリカル核融合炉周辺部分に適用し、トーラス状の磁力線から炉壁に至るまでのプラズマ輸送メカニズムを調べる。

Outline of Final Research Achievements

The gyrokinetic simulation model plays a central role in precisely demonstrating fusion plasma dynamics in magnetic confinement systems. We have improved the gyrokinetic model to apply complicated magnetic field structures in the Large Helical Device and other confinement systems using additional magnetic field perturbations. The developed simulation code was employed to clarify the confinement properties of hydrogen isotope plasmas in the Large Helical Device and plasma transport around magnetic islands.

Academic Significance and Societal Importance of the Research Achievements

らせん状のコイルで閉じ込め磁場を作るヘリカル方式は、日本で大きく発展したプラズマ閉じ込め方式である。核融合炉で想定される長時間運転が可能な点に優位性があるが、特に閉じ込め容器に近い部分の磁場構造が複雑になり、適用可能なシミュレーションモデルは現象論的な一部のものに限られている。本研究で開発した手法は、プラズマの振る舞いを精密に記述できるジャイロ運動論モデルを元に、複雑な構造を持つ磁場中の閉じ込めプラズマにも応用できるため、ヘリカル型核融合炉周辺領域をはじめ、これまで理論的なアプローチが限られていた領域の閉じ込めプラズマに対する物理的な理解に大きく貢献するものと期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (22 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (14 results) (of which Int'l Joint Research: 11 results,  Invited: 3 results)

  • [Int'l Joint Research] Princeton Plasma Physics Laboratory(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Princeton Plasma Physics Laboratory(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] プリンストンプラズマ物理研究所/オークリッジ国立研究所(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] プリンストンプラズマ物理研究所/オークリッジ国立研究所(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] High heat flux reduction to materials using current filaments2023

    • Author(s)
      Trang Le, Yasuhiro Suzuki, Hiroki Hasegawa, Toseo Moritaka, and Hiroaki Ohtani
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 8300-8300

    • DOI

      10.1038/s41598-023-35109-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Isotope effects under the influence of global radial electric fields in a helical configuration2022

    • Author(s)
      T. Moritaka, H. Sugama, M. Cole, R. Hager, S. Ku, C.S. Chang and S. Ishiguro
    • Journal Title

      Nuclear Fusion

      Volume: 62 Issue: 12 Pages: 126059-126059

    • DOI

      10.1088/1741-4326/ac95ab

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improving Gyrokinetic Field Solvers toward Whole-Volume Modeling of Stellarators2021

    • Author(s)
      Toseo MORITAKA, Michael COLE, Robert HAGER, Seung-Hoe KU, C. S. CHANG and Seiji ISHIGURO
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Pages: 2403054-2403054

    • NAID

      130008053126

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator2020

    • Author(s)
      M. D. J. Cole, T. Moritaka, R. Hager, J. Dominski, S. Ku, and C. S. Chang
    • Journal Title

      Physics of Plasmas

      Volume: 27 Issue: 4 Pages: 044501-044501

    • DOI

      10.1063/1.5140232

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Electrostatic field calculation in the edge region of helical confinement devices based on the gyrokinetic model2023

    • Author(s)
      Toseo Moritaka, Robert Hager, Seung-Hoe Ku, C.S. Chang and Suguru Masuzaki
    • Organizer
      34th IUPAP Conference on Computational Physics (CCP2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a gyrokinetic simulation model toward whole-volume modeling of stellarators2023

    • Author(s)
      Toseo Moritaka, Robert Hager, Seung-Hoe Ku, C.S. Chang
    • Organizer
      The 42nd JSST Annual International Conference on Simulation Technology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electrostatic field calculation on a curved surface for gyrokinetic modeling of stellarator edge plasmas2023

    • Author(s)
      Toseo Moritaka, Robert Hager, Seung-Hoe Ku and C.S. Chang
    • Organizer
      Global Plasma Forum in Aomori
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current status of XGC-S code development toward whole-volume modeling of stellarators2023

    • Author(s)
      Toseo Moritaka, Robert Hager, Seung-Hoe Ku and C.S. Chang
    • Organizer
      US-Japan JIFT meeting on exascale computing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kinetic modelling of Transport in Brolen Flux surfaces2023

    • Author(s)
      Joseph Li, Toseo Moritaka, Ryutaro Kanno and Gakushi Kawamura, Robert Hager and C-S. Chang
    • Organizer
      Global Plasma Forum in Aomori
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kinetic modelling of Transport in Brolen Flux surfaces2023

    • Author(s)
      Joseph Li, Toseo Moritaka, Ryutaro Kanno and Gakushi Kawamura, Robert Hager and C-S. Chang
    • Organizer
      The 4th Annual Meeting of The Japan Society of Plasma Science and Nuclear Fusion Research
    • Related Report
      2023 Annual Research Report
  • [Presentation] Recent progress on numerical development toward core-edge modeling of stellarators2022

    • Author(s)
      Toseo Moritaka
    • Organizer
      6th Asia Pacific Conference on Plasma Physics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Electrostatic field calculation in the edge region of a helical fusion device using the gyrokinetic model2022

    • Author(s)
      Toseo Moritaka
    • Organizer
      The 31st International Toki Conference on Plasma and Fusion Research
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electrostatic potential calculations for whole-volume gyrokinetic modeling of stellarators2021

    • Author(s)
      Toseo MORITAKA, Michael COLE, Robert HAGER, Seung-Hoe KU, C. S. CHANG and Seiji ISHIGURO
    • Organizer
      47th European Physical Society Virtual Conference on Plasma Physics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Isotope effects on ion temperature gradient mode with radial electric field in Large Helical Device2021

    • Author(s)
      Toseo MORITAKA, Hideo SUGAMA, Michael COLE, Robert HAGER, C. S. CHANG and Seiji ISHIGURO
    • Organizer
      30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Isotope effects in ion temperature gradient modes with radial electric field in the large helical device2021

    • Author(s)
      Toseo Moritaka, Michael Cole, Robert Hager, Seung-Hoe Ku, C. S. Chang, Masanori Nunami, Seiji Ishiguro, Hideo Sugama
    • Organizer
      28th IAEA Fusion Energy Conference (FEC2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 様々なプラズマ環境への応用に向けたジャイロ運動論 PIC 法の開発2020

    • Author(s)
      森高 外征雄 Michael COLE, Robert HAGER, Seung-Hoe KU, C. S. CHANG and Seiji ISHIGURO
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] ヘリカル核融合炉全系輸送解析のためのジャイロ運動論粒子コードの開発2020

    • Author(s)
      森高外征雄, M. Cole, R. Hager, S. Lazerson, 佐竹真介, 松岡清吉, 沼波政倫, C-S.Chang, 石黒静児, 洲鎌英雄
    • Organizer
      日本物理学会 秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Improved Field Solver for Gyrokinetic Simulation in Stellarator Edge Region2020

    • Author(s)
      Toseo MORITAKA, Michael COLE, Robert HAGER, Seung-Hoe KU, C. S. CHANG and Seiji ISHIGURO
    • Organizer
      The 29th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi