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Generalized Langevin description of multi-scale interactions in plasma turbulence

Research Project

Project/Area Number 20K03892
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14010:Fundamental plasma-related
Research InstitutionNational Institute for Fusion Science (2023)
Nagoya University (2020-2022)

Principal Investigator

Maeyama Shinya  核融合科学研究所, 研究部, 准教授 (70634252)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsプラズマ乱流 / マルチスケール相互作用 / 射影演算子法 / 一般化Langevinモデル / 磁場閉じ込め核融合 / マルチスケール物理 / 非線形相互作用 / 一般化Langevin方程式 / 統計的データ解析 / プラズマ・核融合 / ハイパフォーマンス・コンピューティング
Outline of Research at the Start

プラズマ中で生じる乱流は、大きく質量の異なる電子とイオンに起因して、大小様々なスケールの揺らぎを作り出す。近年のスーパーコンピュータを用いた大規模数値シミュレーションにより、広くスケールの離れたこれらの揺らぎの間にも、相互作用が存在することが明らかになった。本研究では、プラズマ物理・非平衡統計力学・データ科学のアプローチを利用して、プラズマ乱流マルチスケール相互作用を異なるスケール間の相関問題として捉え、コヒーレントな相関項と確率的な無相関項として表す一般化Langevin描像として定式化・体系化することを目指す。本研究の成果は、プラズマ物理学・核融合学・宇宙物理学・流体力学などに貢献する。

Outline of Final Research Achievements

This study elucidated the mechanisms of nonlinear interactions between different scales of turbulence through large-scale numerical simulations and international benchmarks. Specifically, it discovered turbulence transport suppression effects in magnetically confined fusion plasmas and clarified the mutually exclusive nature and anisotropic dissipation effects at different scales. Additionally, the projection operator method was developed as a statistical data analysis tool. The method was applied to turbulence-zonal flow interaction analysis, demonstrating the generalized Langevin description with correlated and uncorrelated terms. The developed code was released as open-source.

Academic Significance and Societal Importance of the Research Achievements

本研究は、プラズマ乱流のマルチスケール相互作用を詳細に解明し、統計的データ解析手法としての射影演算子法を開発・応用したことにより、プラズマ物理学の理解を進展させた。特に、磁場閉じ込め核融合プラズマにおける乱流輸送抑制効果や、異なるスケールの乱流間の相互阻害性を明らかにしたことは、核融合研究におけるブレークスルーである。これにより、将来的な核融合炉の設計や運用における乱流制御技術の向上が期待される。さらに、開発された射影演算子法のオープンソース化により、多くの研究者が利用可能となり、プラズマ乱流研究のさらなる発展が促進されることが期待される。

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

    (64 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (7 results) Journal Article (9 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 9 results,  Open Access: 5 results) Presentation (39 results) (of which Int'l Joint Research: 15 results,  Invited: 7 results) Remarks (9 results)

  • [Int'l Joint Research] DIFFER(オランダ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Massachusetts Institute of Technology(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Southwestern Institute of Physics(中国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] DIFFER(オランダ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Milano-Bicocca(イタリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Max Planck Institute for Plasma Physics(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] フランス原子力庁(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Multi-scale gyrokinetic simulations of JT-60U L-mode plasma: reduction of the ion scale energy loss due to the nonlinear coupling with the electron scale turbulence2024

    • Author(s)
      Xu Shaokang、Maeyama S.、Watanabe T.-H.
    • Journal Title

      Nuclear Fusion

      Volume: 64 Issue: 3 Pages: 036014-036014

    • DOI

      10.1088/1741-4326/ad1f0c

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Overview of multiscale turbulence studies covering ion-to-electron scales in magnetically confined fusion plasma2024

    • Author(s)
      Maeyama Shinya、Tokuzawa Tokihiko、Howard Nathan T、Citrin Jonathan、Watanabe Tomo-Hiko
    • Journal Title

      Nuclear Fusion

      Volume: - Issue: 11 Pages: 112007-112007

    • DOI

      10.1088/1741-4326/ad34e1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 射影演算子法による統計的時系列データ解析とその応用2023

    • Author(s)
      前山伸也, 三分一史和
    • Journal Title

      統計数理

      Volume: 71 Pages: 25-45

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-scale turbulence simulation suggesting improvement of electron heated plasma confinement2022

    • Author(s)
      Maeyama Shinya、Watanabe Tomo-Hiko、Nakata Motoki、Nunami Masanori、Asahi Yuuichi、Ishizawa Akihiro
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 1-8

    • DOI

      10.1038/s41467-022-30852-0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario2022

    • Author(s)
      Citrin J.、Maeyama S.、Angioni C.、Bonanomi N.、Bourdelle C.、Casson F.J.、Fable E.、Goerler T.、Mantica P.、Mariani A.、Sertoli M.、Staebler G.、Watanabe T.
    • Journal Title

      Nuclear Fusion

      Volume: 62 Issue: 8 Pages: 086025-086025

    • DOI

      10.1088/1741-4326/ac7535

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of ion polarization and finite-<i>β</i> on heat transport in slab electron-temperature-gradient driven turbulence2021

    • Author(s)
      Maeyama S.、Kusaka S.、Watanabe T.-H.
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 5 Pages: 052512-052512

    • DOI

      10.1063/5.0044435

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the triad transfer analysis of plasma turbulence: symmetrization, coarse graining, and directional representation2021

    • Author(s)
      Maeyama Shinya、Sasaki Makoto、Fujii Keisuke、Kobayashi Tatsuya、Dendy Richard O、Kawachi Yuichi、Arakawa Hiroyuki、Inagaki Shigeru
    • Journal Title

      New Journal of Physics

      Volume: 23 Issue: 4 Pages: 043049-043049

    • DOI

      10.1088/1367-2630/abeffc

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Compressing the time series of five dimensional distribution function data from gyrokinetic simulation using principal component analysis2021

    • Author(s)
      Asahi Yuuichi、Fujii Keisuke、Heim Dennis Manuel、Maeyama Shinya、Garbet Xavier、Grandgirard Virginie、Sarazin Yanick、Dif-Pradalier Guilhem、Idomura Yasuhiro、Yagi Masatoshi
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 1 Pages: 012304-012304

    • DOI

      10.1063/5.0023166

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structure of the Electron Distribution Function and Induced Beam Instability in Collisionless Magnetic Reconnection with a Strong Guide Field2020

    • Author(s)
      SHIMOMURA Kazuya、WATANABE Tomohiko、MAEYAMA Shinya、ISHIZAWA Akihiro
    • Journal Title

      Plasma and Fusion Research

      Volume: 15 Issue: 0 Pages: 1401084-1401084

    • DOI

      10.1585/pfr.15.1401084

    • NAID

      130007948936

    • ISSN
      1880-6821
    • Year and Date
      2020-11-19
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Cross-scale interactions between trapped electron mode and electron-temperature-gradient driven turbulence2023

    • Author(s)
      S. Maeyama
    • Organizer
      7th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Overview of multi-scale turbulence studies covering ion to electron scales in magnetically confined fusion plasma2023

    • Author(s)
      S. Maeyama, N.T. Howard, J. Citrin, T.-H. Watanabe, T. Tokuzawa
    • Organizer
      29th IAEA Fusion Energy Conference (FEC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 核燃焼プラズマにおけるマルチスケール乱流相互作用2023

    • Author(s)
      前山伸也
    • Organizer
      プラズマシミュレータシンポジウム2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] マルチフィデリティデータ融合手法を用いた乱流輸送モデリング2023

    • Author(s)
      前山伸也,本多充,成田絵美,登田慎一郎
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] マルチフィデリティガウス過程回帰のプラズマ輸送モデリングへの応用2023

    • Author(s)
      前山伸也
    • Organizer
      統計数理研究所共同研究集会「諸科学における統計思考」
    • Related Report
      2023 Annual Research Report
  • [Presentation] 非線形自己回帰ガウス過程回帰を用いたプラズマ乱流輸送モデリング2023

    • Author(s)
      前山伸也
    • Organizer
      情報・システム研究機構(ROIS)戦略的研究プログラム2023年度シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 原型炉級プラズマにおけるマルチスケール乱流輸送シミュレーション2023

    • Author(s)
      前山伸也
    • Organizer
      第40回プラズマ・核融合学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 非線形自己回帰Gauss過程回帰の乱流輸送モデリングへの応用2023

    • Author(s)
      前山伸也,本多充,成田絵美
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ドリフト波乱流-帯状流の相互作用の2成分射影演算子法による解析2023

    • Author(s)
      弓削武龍, 前山伸也, 渡邉智彦
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 帯状流からドリフト波乱流への動的寄与の射影演算子法による解析2023

    • Author(s)
      弓削武龍, 前山伸也, 渡邉智彦
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 電子温度勾配不安定性に対するイオンBernstein波の影響の検討2023

    • Author(s)
      前山伸也, 渡邉智彦
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Multi-scale plasma turbulence simulations with the gyrokinetic simulation code GKV2022

    • Author(s)
      S. Maeyama
    • Organizer
      The Platform for Advanced Scientific Computing Conference 2022 (PASC22)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子・イオン系マルチスケール乱流シミュレーション2022

    • Author(s)
      前山伸也, 渡邉智彦
    • Organizer
      第39回プラズマ・核融合学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 多変数射影演算子法に基づくサブグリッドスケール項の評価とモデリング2022

    • Author(s)
      前山伸也
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] New algorithm for solving sheared flows in local flux-tube gyrokinetic simulations2022

    • Author(s)
      S. Maeyama, T.-H. Watanabe
    • Organizer
      27th International Conference on Numerical Simulations of Plasmas (ICNSP2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 射影演算子法による統計的時系列データ解析とその応用2022

    • Author(s)
      前山伸也, 三分一史和
    • Organizer
      統計数理研究所共同研究集会「諸科学における統計思考」
    • Related Report
      2022 Research-status Report
  • [Presentation] Cross-scale interactions between ion and electron-scale turbulence in magnetized plasmas2022

    • Author(s)
      S. Maeyama
    • Organizer
      JPP Frontiers of Plasma Physics Colloquium
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mori-Zwanzig projection operator method as a statistical analysis of multivariate time-series data2022

    • Author(s)
      S. Maeyama
    • Organizer
      PiAI seminar: Physics informed AI in Plasma Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 核燃焼プラズマにおける乱流輸送現象のマルチスケール性2022

    • Author(s)
      前山伸也,渡邉智彦,仲田資季,沼波政倫,朝比祐一,石澤明宏
    • Organizer
      「富岳」成果創出プログラム研究交流会
    • Related Report
      2021 Research-status Report
  • [Presentation] 回転フラックスチューブによる背景シア流下の局所乱流シミュレーション2022

    • Author(s)
      前山伸也,渡邉智彦,仲田資季,沼波政倫,石澤明宏,朝比祐一
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 核燃焼プラズマに向けたマルチスケール乱流輸送現象の外挿性2022

    • Author(s)
      前山伸也
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 回転フラックスチューブ座標を用いたGKVシミュレーション2022

    • Author(s)
      前山伸也,渡邉智彦,仲田資季,沼波政倫,石澤明宏,朝比祐一
    • Organizer
      「富岳」成果創出加速プログラム核燃焼プラズマ閉じ込め物理の開拓2021年度成果報告会
    • Related Report
      2021 Research-status Report
  • [Presentation] Gyrokinetic Simulations of Cross-Scale Interactions between Electron Temperature Gradient and Trapped Electron Modes on the Supercomputer Fugaku2021

    • Author(s)
      S. Maeyama, T.-H. Watanabe, M. Nakata, M. Nunami, Y. Asahi, A. Ishizawa
    • Organizer
      30th International Toki Conference (ITC30)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exploring multi-scale turbulent interactions in high electron temperature burning plasma2021

    • Author(s)
      S. Maeyama
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Cross-Scale Interactions Between Trapped-Electron-Mode and Electron-Temperature-Gradient-Mode Turbulence2021

    • Author(s)
      S. Maeyama, and T.-H. Watanabe
    • Organizer
      28th IAEA Fusion Energy Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gyrokinetic simulations of multi scale turbulence on the supercomputer Fugaku2021

    • Author(s)
      S. Maeyama
    • Organizer
      IFERC Workshop on GPU Programming 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Generalized Langevin picture of turbulence and zonal flow interactions by means of the projection operator method2021

    • Author(s)
      S. Maeyama, and T.-H. Watanabe
    • Organizer
      47th EPS Conference on Plasma Physics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Multi-scale simulations of trapped electron mode and electron temperature gradient mode turbulence on the supercomputer Fugaku2021

    • Author(s)
      S. Maeyama, and T.-H. Watanabe
    • Organizer
      Joint workshop of Asia-Pacific Transport Working Group and US-EU Transport Task Force 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Symmetrization and directional representation of nonlinear triad interactions in plasma turbulence2021

    • Author(s)
      S. Maeyama, M. Sasaki, K. Fujii, T. Kobayashi, R. O. Dendy, Y. Kawachi, H. Arakawa, S. Inagaki
    • Organizer
      25th Joint EU-US Transport Task Force
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 射影演算子法によるプラズマ乱流相互作用の抽出2021

    • Author(s)
      前山伸也,美澤めぐみ,渡邉智彦
    • Organizer
      プラズマシミュレータシンポジウム2021
    • Related Report
      2021 Research-status Report
  • [Presentation] スーパーコンピュータ「富岳」を用いた補足電子モードと電子温度勾配モードのマルチスケール乱流シミュレーション2021

    • Author(s)
      前山伸也,渡邉智彦
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 三波エネルギー伝達関数の対称化と有向表現2021

    • Author(s)
      前山伸也
    • Organizer
      日本流体力学会年会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 局所ジャイロ運動論シミュレーションにおける背景シア流の新数値解法2021

    • Author(s)
      前山伸也,渡邉智彦,仲田資季,沼波政倫,石澤明宏,朝比祐一
    • Organizer
      第38回プラズマ・核融合学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Mori-Zwanzig projection operator method as a statistical correlation analysis of time-series data2021

    • Author(s)
      S. Maeyama, M. Misawa, T.-H. Watanabe
    • Organizer
      4th IAEA Technical Meeting on Fusion Data Processing, Validation and Analysis
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 三つ組み相互作用によるエネルギー伝達の対称化と有向表現2021

    • Author(s)
      前山伸也, 佐々木真, 藤井恵介, 小林達哉, R. O. Dendy, 河内裕一, 荒川弘之, 稲垣滋
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 射影演算子法による帯状流とドリフト波乱流の相互作用に関する解析2021

    • Author(s)
      美澤めぐみ, 前山伸也, 渡邉智彦
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Toward a systematic understanding of multi-scale interactions between ion and electron-scale turbulence2020

    • Author(s)
      S. Maeyama
    • Organizer
      4th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 射影演算子法を用いた長谷川-若谷プラズマ乱流相互作用の解析2020

    • Author(s)
      前山伸也,渡邉智彦
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 射影演算子法による時系列データ統計解析とその一般化Langevin描像2020

    • Author(s)
      前山伸也
    • Organizer
      統計数理研究所共同研究集会「諸科学における大規模データと統計数理モデリング」
    • Related Report
      2020 Research-status Report
  • [Remarks] Shinya Maeyama's webpage

    • URL

      https://smaeyama.net/

    • Related Report
      2023 Annual Research Report
  • [Remarks] GKV webpage

    • URL

      https://www.p.phys.nagoya-u.ac.jp/gkv/

    • Related Report
      2023 Annual Research Report
  • [Remarks] smaeyama/mzprojection

    • URL

      https://github.com/smaeyama/mzprojection

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Remarks] Shinya Maeyama's homepage

    • URL

      https://www.p.phys.nagoya-u.ac.jp/~smaeyama/index.html

    • Related Report
      2022 Research-status Report
  • [Remarks] GKV homepage

    • URL

      https://www.p.phys.nagoya-u.ac.jp/gkv/

    • Related Report
      2022 Research-status Report
  • [Remarks] Shinya Maeyama's website

    • URL

      https://www.p.phys.nagoya-u.ac.jp/~smaeyama/

    • Related Report
      2021 Research-status Report 2020 Research-status Report
  • [Remarks] GyroKinetic Vlasov simulation code: GKV

    • URL

      https://www.p.phys.nagoya-u.ac.jp/gkv/

    • Related Report
      2021 Research-status Report 2020 Research-status Report
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      https://www.p.phys.nagoya-u.ac.jp/bpp/

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  • [Remarks] GitHub - smaeyama/mzprojection

    • URL

      https://github.com/smaeyama/mzprojection

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URL: 

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

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