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Thermal transport modelling of fusion plasmas based on large-scale transport analyses database

Research Project

Project/Area Number 19K03797
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

YOKOYAMA MASAYUKI  核融合科学研究所, 研究部, 教授 (60290920)

Co-Investigator(Kenkyū-buntansha) 山口 裕之  核融合科学研究所, 研究部, 准教授 (90797101)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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核融合プラズマ / 熱輸送 / 大規模データベース / 統計解析 / 情報量規準 / 重要変数 / 統計数理核融合学 / プラズマ物理 / 統計数理モデリング / 統計モデリング / 赤池情報量規準 / 統計的重要度 / 納得性 / 大規模データ / 熱輸送モデリング / 熱輸送解析 / データベース / 統計手法
Outline of Research at the Start

「実際に使える」核融合プラズマの熱輸送モデルを導出するため、第一原理に基づく従来の研究から発想を大きく転換して、大規模データ(多数の実験データ、多数の熱輸送解析データ)に向き合った手法を提唱、実践する。大型ヘリカル装置の実験解析用統合輸送解析スイートTASK3D-aの開発・運用の実績に基づく発想である。統計解析手法に基づいて、広範囲のパラメータにわたって有効かつ簡便な「使える」熱輸送モデルを提示する。さらに、得られた熱輸送モデルの実験検証を行い、その妥当性を検証する。その上で、トカマクを含めた他実験装置における同様の研究の呼びかけを行うとともに、核融合炉運転制御への活用を見据えた展開も図る。

Outline of Final Research Achievements

Regarding the problem of heat transport in fusion plasmas, we have created a new research trend based on a data-driven approach that makes full use of large-scale databases, which is different from elemental integrated research in plasma physics. Research using two approaches: the database accumulated through the construction and operation of an integrated transport analysis suite for the fusion plasma experiment (LHD), and the gap between models which (1) obtained from physics insights and (2) obtained from data assimilation, have been conducted. In both cases, we were able to obtain the interesting finding that when statistically important variables are extracted, variables that are recognized to be physically important are selected. Based on these achievements, we have applied such data-driven approach to other research topics (eg., scenario development for the record-breaking experiments) and then proposed new interdisciplinary research, "statistical-mathematical fusion research".

Academic Significance and Societal Importance of the Research Achievements

要素統合的な研究と相補的なデータ駆動的アプローチを、高度に複雑な核融合プラズマの課題に適用し、データ駆動的アプローチの有用性とともに、その手法によって、リアルタイムでの予測や判断が必要とされる状況への適応性を各段に高め得ることを示すことができた。さらに、統計的に重要な変数であるとして選び出される変数が、物理的にも重要であることが認識されているものであるという知見も得ることができた。核融合プラズマ研究の新動向の端緒となるものであるが、他の研究分野にも同様の考え方が展開できる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Int'l Joint Research] マックスプランクプラズマ物理研究所(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Plausible Model Improvement Utilizing the Information Obtained from Data Assimilation2024

    • Author(s)
      Masayuki YOKOYAMA, Yuya MORISHITA and Sadayoshi MURAKAMI
    • Journal Title

      Plasma and Fusion Research

      Volume: 19 Issue: 0 Pages: 1203006-1203006

    • DOI

      10.1585/pfr.19.1203006

    • ISSN
      1880-6821
    • Year and Date
      2024-02-08
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 統計数理核融合学~統計数理による核融合研究課題の取り組み~2023

    • Author(s)
      横山 雅之
    • Journal Title

      プラズマ・核融合学会誌

      Volume: 99 Pages: 3-8

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] Extending the total neutron emission rate of steady-state deuterium large helical plasma guided by a data-driven approach2021

    • Author(s)
      K. Ogawa, M. Isobe, M. Yokoyama
    • Journal Title

      Fusion Engineering and Design

      Volume: 167 Pages: 112367-112367

    • DOI

      10.1016/j.fusengdes.2021.112367

    • NAID

      120007116696

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Progress of statistical modelling of thermal transport of fusion plasmas2020

    • Author(s)
      M. Yokoyama, H. Yamaguchi
    • Journal Title

      NUCLEAR FUSION

      Volume: 60 Issue: 10 Pages: 106024-106024

    • DOI

      10.1088/1741-4326/abac6a

    • NAID

      120007180062

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Regression Approach for Acquiring a Quantitative Guidance toward Updating the Deuterium-Deuterium Fusion Neutron Emission Rate in the Large Helical Device2020

    • Author(s)
      K. Ogawa, M. Yokoyama, M. Isobe
    • Journal Title

      Plasma and Fusion Research

      Volume: 15 Pages: 1202087-1202087

    • NAID

      130007957900

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Plausible model creation by means of data assimilation ~ an example: on the thermal transport of fusion plasmas ~2023

    • Author(s)
      Masayuki YOKOYAMA
    • Organizer
      The 4th International Conference on Data Driven Plasma Sciences (ICDDPS-4)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Statistical-mathematical thinking in fusion research2023

    • Author(s)
      Masayuki YOKOYAMA
    • Organizer
      JSST2023, Japan Society for Simulation and Technology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] データ駆動核融合科学(特別講演)2022

    • Author(s)
      横山 雅之
    • Organizer
      核融合エネルギー連合講演会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 核融合研究における統計数理モデリング事例2022

    • Author(s)
      横山 雅之
    • Organizer
      統計数理研究所統計数理セミナー
    • Related Report
      2022 Research-status Report
  • [Presentation] 核融合プラズマの統計数理モデリングとその制御活用の可能性2022

    • Author(s)
      横山 雅之
    • Organizer
      京大数理解析研究所共同研究集会「乱流の予測可能性と可制御性」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 核融合プラズマ解析における情報量規準の活用2021

    • Author(s)
      横山雅之
    • Organizer
      プラズマ・核融合学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Plausible exploitation of statistical approaches on fusion science2021

    • Author(s)
      M. Yokoyama
    • Organizer
      1st Workshop on Artificial Intelligence in Plasma Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] An example for complementarity between plasma physics and data-driven research2021

    • Author(s)
      M. Yokoyama
    • Organizer
      4th IAEA Technical Meeting on Fusion Data Processing, Validation and Analysis
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] One example for bridging the plasma-fusion and statistical-mathematical community on fusion research: Progress of statistical modelling of thermal transport of fusion plasmas2021

    • Author(s)
      M. Yokoyama
    • Organizer
      Phil Morrison’s Friday Meetings
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 回帰手法による核融合プラズマの熱輸送モデリングの進展2020

    • Author(s)
      横山雅之、山口裕之
    • Organizer
      プラズマ・核融合学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 輸送解析データベースと統計手法に基づく 核融合プラズマの熱輸送モデリング2019

    • Author(s)
      横山 雅之ほか
    • Organizer
      プラズマ・核融合学会
    • Related Report
      2019 Research-status Report
  • [Presentation] STATISTICAL INDUCTION OF A THERMAL TRANSPORT MODEL BASED ON THE TRANSPORT ANALYSES DATABASE2019

    • Author(s)
      M. Yokoyama
    • Organizer
      International Stellarator-Heliotron Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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