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Multi-scale interactions in plasma turbulence from viewpoints of localized structures and their parity

Research Project

Project/Area Number 17K14424
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Plasma science
Research InstitutionNagoya University

Principal Investigator

Maeyama Shinya  名古屋大学, 理学研究科, 講師 (70634252)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥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 / プラズマ・核融合 / マルチスケール物理 / 非線形相互作用 / 射影演算子法 / 核燃焼プラズマ / ハイパフォーマンス・コンピューティング
Outline of Final Research Achievements

In magnetically confined plasma observed in space and fusion devices, density and temperature gradients drive micro-instabilities and turbulence governed by electromagnetic fluctuations. This research studies physical mechanisms of multi-scale interactions between large ion-scale and small electron-scale turbulence by means of theory and numerical simulations. We clarified the generation of short-wavelength localized structures by kinetic electron effects in ion-scale instabilities, which effectively interact with the extremely short-wavelength electron-scale instabilities. It is revealed that the mechanism is valid even in ion-scale instabilities having different parity. The results suggest the commonality and generic features of multi-scale interactions.

Academic Significance and Societal Importance of the Research Achievements

プラズマ乱流研究の文脈の下で、電子・イオンスケール乱流間の相互作用はその解析の難しさ故に未解決のまま取り残されてきた。本研究では、乱流を駆動する微視的不安定性の多様性に着目したシミュレーション研究を実施した。イオンスケールの局所電流シート構造を破壊することで極微細スケールの電子スケール乱流が卓越するという、非自明な結果が得られ、申請者らの先行研究との比較からマルチスケール相互作用の普遍的性質が示唆された。その学術的成果は、乱流輸送の予測・評価が装置設計を左右しうる核融合学への貢献、人工衛星観測により多階層・電子スケール物理の研究が進む宇宙物理学への示唆などへの波及効果が期待できる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (38 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (24 results) (of which Int'l Joint Research: 9 results,  Invited: 6 results) Remarks (5 results)

  • [Int'l Joint Research] フランス原子力庁(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] オランダ基礎エネルギー研究所(オランダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] フランス原子力庁(フランス)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Extracting and Modeling the Effects of Small-Scale Fluctuations on Large-Scale Fluctuations by Mori?Zwanzig Projection Operator Method2020

    • Author(s)
      Maeyama Shinya、Watanabe Tomo-Hiko
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 89 Issue: 2 Pages: 024401-024401

    • DOI

      10.7566/jpsj.89.024401

    • NAID

      40022155073

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Persistence of Ion Temperature Gradient Turbulent Transport at Finite Normalized Pressure2019

    • Author(s)
      Ishizawa A.、Urano D.、Nakamura Y.、Maeyama S.、Watanabe T.-H.
    • Journal Title

      Physical Review Letters

      Volume: 123 Issue: 2 Pages: 025003-025003

    • DOI

      10.1103/physrevlett.123.025003

    • NAID

      120006708245

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Correlation between zonal flow shearing and entropy transfer rates in toroidal ion temperature gradient turbulence2019

    • Author(s)
      Miura T.、Watanabe T.-H.、Maeyama S.、Nakata M.
    • Journal Title

      Physics of Plasmas

      Volume: 26 Issue: 8 Pages: 082304-082304

    • DOI

      10.1063/1.5109476

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Overlapping communications in gyrokinetic codes on accelerator‐based platforms2019

    • Author(s)
      Asahi Yuuichi、Latu Guillaume、Bigot Julien、Maeyama Shinya、Grandgirard Virginie、Idomura Yasuhiro
    • Journal Title

      Concurrency and Computation: Practice and Experience

      Volume: 32 Issue: 5 Pages: 1-21

    • DOI

      10.1002/cpe.5551

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Implementation of a gyrokinetic collision operator with an implicit time integration scheme and its computational performance2019

    • Author(s)
      Maeyama S.、Watanabe T.-H.、Idomura Y.、Nakata M.、Nunami M.
    • Journal Title

      Computer Physics Communications

      Volume: 235 Pages: 9-15

    • DOI

      10.1016/j.cpc.2018.07.015

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Suppression of Ion-Scale Microtearing Modes by Electron-Scale Turbulence via Cross-Scale Nonlinear Interactions in Tokamak Plasmas2017

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

      Physical Review Letters

      Volume: 119 Issue: 19 Pages: 195002-195002

    • DOI

      10.1103/physrevlett.119.195002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 射影演算子法による小スケール揺動が大スケール揺動に与える寄与の抽出2019

    • Author(s)
      前山伸也
    • Organizer
      令和元年度MHD研究会「プラズマの複雑現象を対象としたデータマイニングの活用」
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電子・イオンスケール乱流相互作用の抽出とモデル化2019

    • Author(s)
      前山伸也, 渡邉智彦
    • Organizer
      第36回プラズマ・核融合学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Methodology for extracting and modeling electron-scale effects in multi-scale plasma turbulence2019

    • Author(s)
      S. Maeyama, T.-H. Watanabe
    • Organizer
      3rd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current status of GKV code2019

    • Author(s)
      S. Maeyama
    • Organizer
      Joint US-Japan Workshop on PostK-ECP Collaboration and JIFT Exascale Computing Collaboration
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 射影演算子法によるプラズマ乱流マルチスケール相互作用の抽出2019

    • Author(s)
      前山伸也
    • Organizer
      プラズマシミュレータシンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 森-Zwanzigの射影演算子法を利用した小スケールから大スケールへの寄与の抽出とモデル化2019

    • Author(s)
      前山伸也, 渡邉智彦
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Multi-scale simulation of electron/ion-scale turbulence in Tokamak plasmas2019

    • Author(s)
      S. Maeyama
    • Organizer
      US-Japan JIFT Workshop on Multi-scale Simulations in Plasma Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子スケール乱流がイオンスケール乱流に及ぼす影響の抽出2019

    • Author(s)
      前山伸也,渡邉智彦
    • Organizer
      第74回日本物理学会年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 原型炉およびJT-60SAに向けた微視的不安定性の電磁的ジャイロ運動論的解析2019

    • Author(s)
      前山伸也
    • Organizer
      第8回IFERC-CSC研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] Application of Mori-Zwanzig projection operator method to multi-scale turbulence problems2019

    • Author(s)
      S. Maeyama, T.-H. Watanabe
    • Organizer
      Max Planck Princeton Center Workshop 2019 (MPPC2019)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of electron-scale turbulence on ion-scale turbulence in Tokamak plasmas2018

    • Author(s)
      S. Maeyama
    • Organizer
      2nd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Roles of sub-ion-scale structures on cross-scale interactions in Tokamak plasma turbulence2018

    • Author(s)
      S. Maeyama
    • Organizer
      11th Plasma Kinetics Working Meeting (WPI2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] プラズマ乱流マルチスケール相互作用の抽出とモデル化2018

    • Author(s)
      前山伸也
    • Organizer
      プラズマシミュレータシンポジウム2018
    • Related Report
      2018 Research-status Report
  • [Presentation] JT-60SA・原型炉に向けた微視的電磁不安定性解析2018

    • Author(s)
      前山伸也
    • Organizer
      第24回NEXT研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] マイクロティアリングモードが乱流輸送に与える影響2018

    • Author(s)
      前山伸也
    • Organizer
      第23回NEXT研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 電子・イオンスケール乱流間のマルチスケール相互作用に関する研究(若手奨励賞受賞記念講演)2018

    • Author(s)
      前山伸也
    • Organizer
      第73回日本物理学会年次大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Fourier-Laguerre展開による磁化プラズマ乱流中の位相空間カスケードの解析2018

    • Author(s)
      前山伸也,國成希浩,渡邉智彦
    • Organizer
      第73回日本物理学会年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Cross-Scale interactions between electron and ion scale plasma turbulence via sub-ion-scale structures2017

    • Author(s)
      S. Maeyama
    • Organizer
      25th International Conference on Numerical Simulation of Plasmas
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Cross-scale interactions between electron and ion scale plasma turbulence via sub-ion-scale structures2017

    • Author(s)
      前山伸也
    • Organizer
      平成29年度閉じ込め・輸送研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] Effects of electron-scale turbulence in magnetic fusion plasma2017

    • Author(s)
      前山伸也
    • Organizer
      実験室・宇宙プラズマ研究会「乱流・輸送・粒子加速」
    • Related Report
      2017 Research-status Report
  • [Presentation] Multi-scale interactions between electron-temperature-gradient-mode and micro-tearing-mode turbulence2017

    • Author(s)
      前山伸也,渡邉智彦,石澤明宏
    • Organizer
      Plasma Conference 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Suppression of micro-tearing modes by electron temperature gradient modes2017

    • Author(s)
      前山伸也
    • Organizer
      プラズマシミュレータシンポジウム2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Multi-scale turbulence simulations of micro-tearing modes and electron-temperature-gradient modes2017

    • Author(s)
      S. Maeyama
    • Organizer
      US-Japan JIFT Exascale Computing Workshop 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of electron-scale turbulence on micro-tearing modes2017

    • Author(s)
      S. Maeyama, T.-H. Watanabe, A. Ishizawa
    • Organizer
      7th APTWG International Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] Shinya Maeyama's website

    • URL

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

    • Related Report
      2019 Annual Research Report
  • [Remarks] 名古屋大学教員データベース

    • URL

      http://profs.provost.nagoya-u.ac.jp/view/html/100008165_ja.html

    • Related Report
      2019 Annual Research Report 2018 Research-status Report 2017 Research-status Report
  • [Remarks] GyroKinetic Vlasov simulation code: GKV

    • URL

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

    • Related Report
      2019 Annual Research Report
  • [Remarks] Shinya Maeyama's website

    • URL

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

    • Related Report
      2018 Research-status Report 2017 Research-status Report
  • [Remarks] GyroKinetic Vlasov simulation code: GKV

    • URL

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

    • Related Report
      2018 Research-status Report 2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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