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Transport dynamics in linearly magnetized plasmas through the formation of higher-order nonlinear structures

Research Project

Project/Area Number 21K03508
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 InstitutionKyushu University (2022-2023)
Shimane University (2021)

Principal Investigator

Arakawa Hiroyuki  九州大学, 医学研究院, 准教授 (00615106)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsプラズマ乱流 / 帯状流 / 乱流輸送 / 輸送ダイナミクス / 高次非線形構造 / レーザー誘起蛍光法 / ベクトルトモグラフィー
Outline of Research at the Start

プラズマ乱流輸送研究においては、これまで乱流と流れという2体系の相互作用が主に考えられており、孤立渦・飛沫といった高次非線形構造の影響は小さいとして、実験・理論共にほとんど考慮されていなかった。近年の申請者らの研究で3次・4次的に形成された構造観測により、高次非線形構造形成に伴い、輸送が大きく変化する乱流状態を発見した。本研究では、これを更に発展させ、様々な乱流条件において高次非線形構造の輸送を評価し、高次非線形構造による輸送ダイナミクスの系統的理解を目指す。

Outline of Final Research Achievements

We evaluated energy transport driven by higher-order nonlinear structures in frequency regime of drift waves in linearly magnetized plasmas. Under systematically varied neutral gas pressure and magnetic field strength, we assessed temporal energy transfer among azimuthal flow, lower-order nonlinear structures, and higher-order nonlinear structures. The magnitude of energy transfer has nonlinear relation with the energy of each structure; multiple conditions were observed where structures with lower energy still influenced the entire plasma. As a related study, we developed the radially Langmuir probes with 10 channels and a reconstruction method for two-dimensional flow vector fields using vector tomography.

Academic Significance and Societal Importance of the Research Achievements

プラズマ乱流輸送の研究では、これまで乱流(ドリフト波)と流れ(帯状流)の相互作用が中心で、高次非線形構造の影響はほとんど無視されてきた。しかし最近の研究で、特定の条件下では高次非線形構造がプラズマ全体に重要な影響を与えることがわかってきた。本研究では、系統的に外部制御パラメータを変化させ、種々の乱流条件において高次非線形構造と流れ、基本波構造とのエネルギー移送を評価した。その結果、エネルギーが相対的に小さい高次非線形構造でもプラズマ全体に大きく影響する条件が複数得られた。本研究により、乱流輸送理論の改善や磁場閉じ込め核融合炉の性能向上に寄与する可能性がある。

Report

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

    (10 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (1 results)

  • [Int'l Joint Research] Universite de Lorraine(フランス)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Observation of Quasi-Periodic Two-Dimensional Velocity Fields in Plasma Using Tomographic Laser-Induced Fluorescence Spectroscopy2023

    • Author(s)
      ARAKAWA Hiroyuki、SASAKI Makoto、INAGAKI Shigeru、TERASAKA Kenichiro、KAWACHI Yuichi、KIN Fumiyoshi、YAMADA Takuma、NAGASHIMA Yoshihiko、FUJISAWA Akihide
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 1201086-1201086

    • DOI

      10.1585/pfr.18.1201086

    • ISSN
      1880-6821
    • Year and Date
      2023-10-12
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of Turbulence Driven Particle Transport in PANTA by Using Multi-Field Singular Value Decomposition2023

    • Author(s)
      KODAHARA Takumi、SASAKI Makoto、KAWACHI Yuichi、JAJIMA Yuki、KOBAYASHI Tatsuya、YAMADA Takuma、ARAKAWA Hiroyuki、FUJISAWA Akihide
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 1202036-1202036

    • DOI

      10.1585/pfr.18.1202036

    • ISSN
      1880-6821
    • Year and Date
      2023-06-05
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reynolds Force Evaluation of Quasi-Coherent Structure by Tomographic Laser-Induced Fluorescence Spectroscopy2023

    • Author(s)
      ARAKAWA Hiroyuki、SASAKI Makoto、INAGAKI Shigeru、FUJISAWA Akihide
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 1401032-1401032

    • DOI

      10.1585/pfr.18.1401032

    • ISSN
      1880-6821
    • Year and Date
      2023-05-12
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of trapping finer-scale fluctuations in a solitary vortex in linear magnetized plasma2023

    • Author(s)
      Arakawa Hiroyuki、Sasaki Makoto、Inagaki Shigeru、Lesur Maxime、Kosuga Yusuke、Kobayashi Tatsuya、Kin Fumiyoshi、Yamada Takuma、Nagashima Yoshihiko、Fujisawa Akihide、Itoh Kimitaka
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 65 Issue: 11 Pages: 115002-115002

    • DOI

      10.1088/1361-6587/acfbb3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Proposal to Evaluate Electron Temperature and Electron Density Fluctuations Using Dual Wavelength Emission Intensity Tomography in a Linear Plasma2023

    • Author(s)
      Nagashima Yoshihiko、Fujisawa Akihide、Yamasaki Kotaro、Inagaki Shigeru、Moon Chanho、Kin Fumiyoshi、Kawachi Yuichi、Arakawa Hiroyuki、Yamada Takuma、Kobayashi Tatsuya、Kasuya Naohiro、Kosuga Yusuke、Sasaki Makoto、Ido Takeshi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 3 Pages: 033501-033501

    • DOI

      10.7566/jpsj.92.033501

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Formation Process of a Solitary Vortex in a Zonal Flow - Drift-Wave Dynamics2022

    • Author(s)
      ARAKAWA Hiroyuki、SASAKI Makoto、INAGAKI Shigeru、LESUR Maxime、KOSUGA Yusuke、KOBAYASHI Tatsuya、KIN Fumiyoshi、YAMADA Takuma、NAGASHIMA Yoshihiko、FUJISAWA Akihide、ITOH Kimitaka
    • Journal Title

      Plasma and Fusion Research

      Volume: 17 Issue: 0 Pages: 1301106-1301106

    • DOI

      10.1585/pfr.17.1301106

    • ISSN
      1880-6821
    • Year and Date
      2022-11-24
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dynamic interaction between fluctuations with different origins in a linear magnetized plasma2021

    • Author(s)
      Kawachi Y.、Inagaki S.、Sasaki M.、Kosuga Y.、Yamasaki K.、Kobayashi T.、Kin F.、Yamada T.、Arakawa H.、Nagashima Y.、Moon C.、Kasuya N.、Fujisawa A.
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 11 Pages: 112302-112302

    • DOI

      10.1063/5.0065887

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bayesian inference of ion velocity distribution function from laser-induced fluorescence spectra2021

    • Author(s)
      Tokuda S.、Kawachi Y.、Sasaki M.、Arakawa H.、Yamasaki K.、Terasaka K.、Inagaki S.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-021-00138-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 多チャンネル計測による直線プラズマの乱流解析2024

    • Author(s)
      山田琢磨, 菊田航介, 荒川弘之, 佐々木真, 西澤敬之, 文贊鎬, 永島芳彦, 小菅佑輔, 糟谷直宏, 藤澤彰英
    • Organizer
      日本物理学会 2024年春季大会
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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