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Verification of Suppression Effect of Zonal Flow on Electron Temperature Gradient Mode in Magnetized Plasma

Research Project

Project/Area Number 19K23426
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionKyushu University

Principal Investigator

MOON Chanho  九州大学, 応用力学研究所, 助教 (50734753)

Project Period (FY) 2019-08-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords高周波揺動 / ETGモード / PANTA / 電子温度勾配 / E×Bフロー速度シア / ヘリウムプラズマ / プラズマ揺動
Outline of Research at the Start

核融合プラズマ閉じ込め装置における異常輸送の新たな要因として注目を集めている「電子温度勾配(ETG)不安定性(ETGモード)駆動乱流の抑制機構」を解明することが,経済的な核融合発電実現の観点から重要な課題である.一方,理論やシミュレーションの研究では,ETGモードの非線形過程により巨視的な帯状流(Zonal Flow)が発生し,それによってミクロスケールのETGモードが抑制されると予測している. そこで本研究では,磁力線に垂直方向の電子温度勾配を自在に制御できるように九州大学の小型直線装置PANTAを改良して,ETGモードの非線形過程に起因するZonal Flowを実験的に検証する.

Outline of Final Research Achievements

This study aims to identify high-frequency fluctuation ETG (Electron Temperature Gradient) mode and to evaluate their nonlinear characteristics using a linear magnetized device PANTA. In order to directly measure the high-frequency ETG modes, a new electrostatic probe has been fabricated, which enables plasma fluctuation measurements up to higher frequencies (< 2 MHz) than those with conventional electrostatic probes. On the other hand, in the case of helium helicon plasma, the low-frequency density fluctuation of ~5.5 kHz and the high-frequency density fluctuation of ~200 kHz was observed at the same time under low magnetic field conditions.

Academic Significance and Societal Importance of the Research Achievements

直線装置PANTAにおける乱流揺動研究に関して, 高周波揺動まで観測できる計測方法の確立は, 多スケール揺動との非線形相互作用の研究などに貢献できると期待される. また, ヘリウムヘリコンプラズマにおける乱流揺動の磁場依存性の実験結果は, 学術的に価値があると考えられる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2021 2020 2019

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 5 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Proposal of Analysis Method for Pattern Recognition of Two-Dimensional Structure of Plasma2021

    • Author(s)
      KOBAYASHI Taiki、FUJISAWA Akihide、NAGASHIMA Yoshihiko、MOON Chanho、NISHIMURA Daiki、YAMASAKI Kotaro、INAGAKI Shigeru
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 1201082-1201082

    • DOI

      10.1585/pfr.16.1201082

    • NAID

      130008059295

    • ISSN
      1880-6821
    • Year and Date
      2021-06-18
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fourier-Rectangular Function Analysis of Spatiotemporal Structure of Bursting Phenomenon in a Cylindrical Plasma2021

    • Author(s)
      NISHIMURA Daiki、FUJISAWA Akihide、NAGASHIMA Yoshihiko、MOON Chanho、YAMASAKI Kotaro、KOBAYASHI Taiki、INAGAKI Shigeru
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 1201075-1201075

    • DOI

      10.1585/pfr.16.1201075

    • NAID

      130008053042

    • ISSN
      1880-6821
    • Year and Date
      2021-06-07
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The first observation of 4D tomography measurement of plasma structures and fluctuations2021

    • Author(s)
      Moon Chanho、Yamasaki Kotaro、Nagashima Yoshihiko、Inagaki Shigeru、Ido Takeshi、Yamada Takuma、Kasuya Naohiro、Kosuga Yusuke、Sasaki Makoto、Kawachi Yuichi、Nishimura Daiki、Kobayashi Taiki、Fujisawa Akihide
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-021-83191-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Correlation-estimated conditional average method and its application on solitary oscillation in PANTA2021

    • Author(s)
      Kobayashi T-K、Fujisawa A、Nagashima Y、Moon C、Yamasaki K、Nishimura D、Inagaki S、Yamada T、Kasuya N、Kosuga Y、Sasaki M、Kawachi Y
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 63 Issue: 3 Pages: 032001-032001

    • DOI

      10.1088/1361-6587/abd980

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Modal polarization analysis using Fourier-rectangular function transform in a cylindrical plasma2021

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

      Journal of Applied Physics

      Volume: 129 Issue: 9 Pages: 093301-093301

    • DOI

      10.1063/5.0037352

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Magnetic Field Dependence of Plasma Properties Observed with Tomography in PANTA2020

    • Author(s)
      Marui I., Fukisaw A., Nagashima Y.、Moon C.、Yamasaki K., Inagaki S.、and Yamada T.
    • Journal Title

      Plasma and Fusion Research

      Volume: 15 Issue: 0 Pages: 1201018-1201018

    • DOI

      10.1585/pfr.15.1201018

    • NAID

      130007840522

    • ISSN
      1880-6821
    • Year and Date
      2020-04-14
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tomography system for two-dimensional observation of fluctuation in magnetized plasma2020

    • Author(s)
      Yamasaki K.、Fujisawa A.、Nagashima Y.、Moon C.、Inagaki S.、Yamada T.
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 3 Pages: 033502-033502

    • DOI

      10.1063/1.5144480

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spatial structure of low-frequency fluctuations throughout the transition of poloidal flow velocity in edge plasmas of LHD2019

    • Author(s)
      Moon C.、Kobayashi T.、Ida K.、Tokuzawa T.、Hidalgo C.、Yoshinuma M.、Ogawa K.、Itoh K.、Fujisawa A.、and LHD Experiment Group
    • Journal Title

      Physics of Plasmas

      Volume: 26 Issue: 9 Pages: 092302-092302

    • DOI

      10.1063/1.5098954

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fourier-rectangular function analysis for cylindrical plasma images2019

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

      Journal of Applied Physics

      Volume: 126 Issue: 4 Pages: 043304-043304

    • DOI

      10.1063/1.5108717

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 4次元トモグラフィ、プラズマの特異な挙動を観測2021

    • Author(s)
      文 贊鎬
    • Organizer
      九州大学 応用力学研究所(RIAM) フォーラム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Verification of ETG mode Energy Transfer to Drift-Wave mode through Multiscale Nonlinear Interactions2021

    • Author(s)
      Chanho Moon, Toshiro Kaneko, Shigeru Inagaki, Akihide Fujisawa, and Rikizo Hatakeyama
    • Organizer
      9th Asia Pacific Transport Working Group (APTWG) International Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Versatile Three-dimensional Tomographic Imaging System for the Plasma Turbulence Dynamic Studies2021

    • Author(s)
      C. Moon, A. Fujisawa, Y. Nagashima, T-K Kobayashi, and D. Nishimura
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 四次元トモグラフィ計測を用いた直線プラズマのダイナミクス観測2021

    • Author(s)
      文 贊鎬, 稲垣滋, 永島芳彦, 山田琢磨, 糟谷直宏, 小菅佑輔, 小林大輝, 西村大輝, 山崎広太郎,藤澤彰英
    • Organizer
      第38回プラズマ・核融合学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 直線型磁化プラズマPANTAにおける揺動の3次元ダイナミクス2020

    • Author(s)
      文贊鎬, 稲垣滋, 永島芳彦, 山崎広太郎, 糟谷直宏, 小菅佑輔, 佐々木真, 井戸毅, 山田琢磨, 赤司智宏, 小林大輝, 西村大輝, 藤澤彰英
    • Organizer
      日本物理学会 2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] トモグラフィーを用いた直線磁化プラズマの3次元構造解析2020

    • Author(s)
      文 贊鎬
    • Organizer
      第37回プラズマ・核融合学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 4次元プラズマ乱流構造研究のためのトモグラフィの開発2020

    • Author(s)
      文 贊鎬
    • Organizer
      核融合エネルギーフォーラムプラズマ物理クラスター計測サブクラスター令和2年度第1回会合
    • Related Report
      2020 Research-status Report
  • [Presentation] PLATO計画のための3次元乱流ダイナミクス観測を目指したトモグラフィの開発2019

    • Author(s)
      文贊鎬, 藤澤彰英, 永島芳彦, 山崎広太郎, 稲垣滋, 糟谷直宏, 小菅佑輔, 佐々木真, 井戸毅, 山田琢磨
    • Organizer
      日本物理学会2019秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 3次元トモグラフィ計測を用いたPANTAプラズマの乱流構造解析2019

    • Author(s)
      文贊鎬,永島芳彦,山崎広太郎,稲垣滋,糟谷直宏,小菅佑輔,佐々木真,井戸毅,山田琢磨,挾間田一誠,河内裕一,荒木健,丸井一生,星野智,赤司智宏,小林大輝,西村大輝,藤澤彰英
    • Organizer
      第36回 プラズマ・核融合学会
    • Related Report
      2019 Research-status Report
  • [Presentation] トモグラフィーを用いた直線プラズマの3次元構造解析2019

    • Author(s)
      文贊鎬
    • Organizer
      プラズマインフォマティクス研究会
    • Related Report
      2019 Research-status Report

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Published: 2019-09-03   Modified: 2023-01-30  

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