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2010 Fiscal Year Annual Research Report

マイクロ波イメージング反射計を用いたLHDでのプラズマ乱流計測

Research Project

Project/Area Number 21246140
Research InstitutionNational Institute for Fusion Science

Principal Investigator

長山 好夫  核融合科学研究所, ヘリカル研究部, 教授 (10126138)

Co-Investigator(Kenkyū-buntansha) 山口 聡一朗  関西大学, システム理工学部, 助教 (30413991)
間瀬 淳  九州大学, 産学連携センター, 特任教授 (00023325)
近木 祐一郎  福岡工業大学, 工学部, 准教授 (10398109)
Keywordsマイクロ波 / イメージング / 反射計 / 電子密度揺動 / LHD / プラズマ計測 / 乱流 / 可視化
Research Abstract

プラズマは電磁波を反射するがそのカットオフ周波数は電子密度と磁場に依存する。LHDではプラズマ中心部の磁揚が高いので,異なる周波数のマイクロ波を入射するとその反射位置は周波数が高いほど中心に近い。さらに電子密度の変動が反射面の変動となるので,二次元検出器上に結像することで,電子密度揺動の三次元計測が可能となる。これまで我々は,HMA(Horn-Mixer-Array)と呼ばれる二次元検出器および多周波数受信機の開発を行ってきた。本年度,二次元マイクロ波検出器を世界で初めて完成させ,それを用いたマイクロ波イメージング計測器をLHDに取り付け実験した。LHDのエッジプラズマではしばしば周波数が数kHz程度の高次高調波を伴うMHDモード(Edge Harmonic Oscillation : EHO)が発生する。今回,MIRを用いて,EHOが引き起こす電子密度揺動の3次元イメージング計測に成功した。これは本研究が目指す乱流可視化の第一歩として有意義である。

  • Research Products

    (20 results)

All 2011 2010

All Journal Article (9 results) (of which Peer Reviewed: 8 results) Presentation (11 results)

  • [Journal Article] Maximum Entropy Analysis of the 2D Density Turbulence Measured by MIR in TPE-RX2010

    • Author(s)
      Z.Shi, Y.Nagayama, ほか
    • Journal Title

      Plasma and Fusion Research

      Volume: 5 Pages: S1019

    • Peer Reviewed
  • [Journal Article] Investigation of Turbulence by Microwave Imaging Reflectometry in the TPE-RX Reversed Field Pinch2010

    • Author(s)
      Z.Shi, Y.Nagayama, ほか
    • Journal Title

      Journal of Plasma and Fusion Research SERIES

      Volume: 9 Pages: 54-58

    • Peer Reviewed
  • [Journal Article] Upgrade of 2-D Antenna Array for Microwave Imaging Reflectometry and ECE Imaging2010

    • Author(s)
      D.Kuwahara, S.Tsuji-Iio, Y.Nagayama, ほか
    • Journal Title

      Journal of Plasma and Fusion Research SERIES

      Volume: 9 Pages: 125-130

    • Peer Reviewed
  • [Journal Article] Development of electron cyclotron emission imaging system on Large Helical Device2010

    • Author(s)
      D.Kuwahara, S.Tsuji-Iio, Y.Nagayama, ほか
    • Journal Title

      Review of Scientific Instruments

      Volume: 81 Pages: 10D919

    • Peer Reviewed
  • [Journal Article] Simultaneous projection and detection system of four different frequencies for microwave imaging reflectometry in Large Helical Device2010

    • Author(s)
      T.Yoshinaga, Y.Nagayama, ほか
    • Journal Title

      Review of Scientific Instruments

      Volume: 81 Pages: 10D915

    • Peer Reviewed
  • [Journal Article] Optics Design for Microwave Imaging Reflectometry in LHD2010

    • Author(s)
      T.Yoshinaga, Y.Nagayama, ほか
    • Journal Title

      Plasma and Fusion Research

      Volume: 5 Pages: 030

    • Peer Reviewed
  • [Journal Article] A Proposal for the Global Remote Participation System2010

    • Author(s)
      Y.Nagayama, ほか
    • Journal Title

      Journal of Plasma and Fusion Research SERIES

      Volume: 9 Pages: 147-151

    • Peer Reviewed
  • [Journal Article] A proposal for the ITER remote participation system in Japan2010

    • Author(s)
      Y.Nagayama, ほか
    • Journal Title

      Fusion Engineering and Design

      Volume: 85 Pages: 535-539

    • Peer Reviewed
  • [Journal Article] MICROWAVE IMAGING IN THE LARGE HELICAL DEVICE2010

    • Author(s)
      T.Yoshinaga, Y.Nagayama, ほか
    • Journal Title

      Proceedings of 16th Joint Workshop on ECE & ECRH (EC16)

      Volume: 5 Pages: 030

  • [Presentation] Development of microwave imaging diagnostics in LHD2011

    • Author(s)
      Y.Nagayama
    • Organizer
      2nd Collaborative Forum between Shizuoka University and the National Institute Fusion Science (NIFS)
    • Place of Presentation
      Shizuoka, Japan(招待講演)
    • Year and Date
      2011-02-15
  • [Presentation] Development of Microwave Imaging Reflectometry in LHD2010

    • Author(s)
      Yoshio Nagayama
    • Organizer
      20th International Toki Conference (ITC-20) on The Next Twenty Years in Plasma and Fusion Science
    • Place of Presentation
      Toki-City, Japan
    • Year and Date
      20101207-20101210
  • [Presentation] Development of ECE Imaging Diagnostic system on LHD2010

    • Author(s)
      Daisuke Kuwahara
    • Organizer
      20th International Toki Conference (ITC-20) on The Next Twenty Years in Plasma and Fusion Science
    • Place of Presentation
      Toki-City, Japan
    • Year and Date
      20101207-20101210
  • [Presentation] Development of Microwave Imaging Diagnostics System in LHD2010

    • Author(s)
      Tomokazu Yoshinaga
    • Organizer
      20th International Toki Conference (ITC-20) on The Next Twenty Years in Plasma and Fusion Science
    • Place of Presentation
      Toki-City, Japan
    • Year and Date
      20101207-20101210
  • [Presentation] Tomography and Data Acquisition2010

    • Author(s)
      Yoshio Nagayama
    • Organizer
      The 5th Japan-Korea Diagnostics Seminar on Advanced Diagnostics for Steady-State Fusion Plasma
    • Place of Presentation
      Kuju Center, Kyushu, Japan(招待講演)
    • Year and Date
      20100826-20100829
  • [Presentation] Simultaneous projection and detection system of four different frequencies for microwave imaging reflectometry in Large Helical Device2010

    • Author(s)
      T.Yoshinaga
    • Organizer
      18th topical conference on high temperature plasma diagnostics
    • Place of Presentation
      Wildwood NJ U.S.A.
    • Year and Date
      20100516-20100520
  • [Presentation] Development of electron cyclotron emission imaging system on Large Helical Device2010

    • Author(s)
      D.Kuwahara
    • Organizer
      18th topical conference on high temperature plasma diagnostics
    • Place of Presentation
      Wildwood NJ U.S.A.
    • Year and Date
      20100516-20100520
  • [Presentation] MICROWAVE IMAGING IN THE LARGE HELICAL DEVICE2010

    • Author(s)
      T.Yoshinaga
    • Organizer
      16th Joint Workshop on ECE & ECRH (EC16)
    • Place of Presentation
      三亜(中国)
    • Year and Date
      20100412-20100415
  • [Presentation] LHDにおけるマイクロ波イメージング計測の開発2010

    • Author(s)
      長山好夫
    • Organizer
      プラズマ・核融合学会第27回年会
    • Place of Presentation
      札幌(招待講演)
    • Year and Date
      2010-12-03
  • [Presentation] LHDにおけるマイクロ波イメージング反射計計測2010

    • Author(s)
      吉永智一
    • Organizer
      プラズマ・核融合学会第27回年会
    • Place of Presentation
      札幌
    • Year and Date
      2010-12-01
  • [Presentation] LHDにおけるECEイメージング計測2010

    • Author(s)
      桑原大介
    • Organizer
      プラズマ・核融合学会第27回年会
    • Place of Presentation
      札幌
    • Year and Date
      2010-12-01

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Published: 2012-07-19  

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