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Experimental evaluation of bulk-ion heating by energetic particle driven instabilities

Research Project

Project/Area Number 24656561
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeSingle-year Grants
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

OSAKABE Masaki  核融合科学研究所, ヘリカル研究部, 教授 (90280601)

Co-Investigator(Kenkyū-buntansha) IDO Takeshi  核融合科学研究所, へリカル研究部, 准教 授 (50332185)
TOKUZAWA Tokihiko  核融合科学研究所, へリカル研究部, 准教 授 (90311208)
SHIMIZU Akihiro  核融合科学研究所, へリカル研究部, 助教 (00390633)
Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsGAM / 高速イオン励起不安定性 / イオン異常加熱 / αチャンネリング / fast ion / alpha channeling
Research Abstract

On the Large Helical Device, the excitation of energetic particle driven instability, whose toroidal mode number is zero, and the increase in ion temperature being associated with the activity of the instabilities is observed when energetic particle beams are injected to very low density micro-wave sustained plasmas. From a theoretical analysis based on experimental observation, the instability was evaluated to be Geodesic Acoustic Mode (GAM). From the correlation analysis between the activity of the mode and the ion temperature behaviors, it was concluded the anomalous heating of bulk-ions is the most probable mechanism to explain the increase in the ion temperatures.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (12 results)

All 2013 2012

All Journal Article (2 results) Presentation (10 results) (of which Invited: 1 results)

  • [Journal Article] Identification of Energetic-particle Driven Geodesic Acoustic Mode in the LHD Plasmas2013

    • Author(s)
      T.Ido, M. Osakabe, A.Shimizu, M.Nishiura, T.Watari, K.Toi, Y.Yoshimura, and S.Kato
    • Journal Title

      Annual Report of National Institute for Fusion Science

      Volume: April 2012-March 2013 Pages: 104-104

    • Related Report
      2013 Annual Research Report
  • [Journal Article] Observation of Clump and Hole Formation in the Energetic-ion Spectra by GAM Burst Activities2013

    • Author(s)
      M.Osakabe, T.Ido, K.Toi, A.Shimizu, T.Tokuzawa, K.Ogawa, M.Isobe and LHD experiment group
    • Journal Title

      Annual Report of National Institute for Fusion Science

      Volume: April 2012-March 2013 Pages: 128-128

    • Related Report
      2013 Annual Research Report
  • [Presentation] Large electrostatic potential fluctuation associated with energetic-particle driven geodesic acoustic mode in LHD2013

    • Author(s)
      T. Ido, A. Shimizu, M. Osakabe, 他
    • Organizer
      23rd International Toki Conference
    • Place of Presentation
      Toki (Japan)
    • Year and Date
      2013-11-18
    • Related Report
      2013 Final Research Report
  • [Presentation] Indication of anomalous ion-heating associated with energetic particle driven Geodesic Acoustic Mode(GAM) on LHD2013

    • Author(s)
      M.Osakabe, T.Ido, K.Ogawa, A.Shimizu, 他
    • Organizer
      13^<th> IAEA Technical Meeting on Energetic Particle
    • Place of Presentation
      Beijing (China)
    • Related Report
      2013 Final Research Report
  • [Presentation] Characteristics of EGAM and influence on ion energy spectra in the LHD plasmas2013

    • Author(s)
      T. Ido, M. Osakabe, A. Shimizu, 他
    • Organizer
      3rd Asia Pacific Transport Working Group International Conference
    • Place of Presentation
      Jeju (Korea)
    • Related Report
      2013 Final Research Report
  • [Presentation] Measurement of ion mass density by GAM spectroscopy2013

    • Author(s)
      T. Tokuzawa, S. Inagaki, K. Itoh, S.-I. Itoh, K. Ida, T. Ido, A. Shimizu, A. Fujisawa, H. Yamada, K. Toi, K. Ogawa, M. Isobe, M. Osakabe, 他
    • Organizer
      3rd Asia Pacific Transport Working Group International Conference
    • Place of Presentation
      Jeju (Korea)
    • Related Report
      2013 Final Research Report
  • [Presentation] Indication of anomalous ion-heating associated with energetic particle driven Geodesic Acoustic Mode(GAM) on LHD2013

    • Author(s)
      M.Osakabe, T.Ido, K.Ogawa, A.Shimizu, M.Yokoyama, M.Isobe, K.Toi, S.Kubo, D.A.Spong, K.Nagaoka, Y.Takeiri and LHD-group
    • Organizer
      高エネルギー粒子に関わるIAEA技術専門家会合
    • Place of Presentation
      Beijin,China
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Characteristics of EGAM and influence on ion energy spectra in the LHD plasmas2013

    • Author(s)
      T. Ido, M. Osakabe, A. Shimizu, M. Nishiura, T. Itoh, T. Watari, K.Itoh, Y. Yoshimura, K. Toi, K. Ogawa, S. Satake, and the LHD experiment group
    • Organizer
      3rd Asia Pacific Transport Working Group International Conference
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2013 Annual Research Report
  • [Presentation] Large electrostatic potential fluctuation associated with energetic-particle driven geodesic acoustic mode in LHD2013

    • Author(s)
      T. Ido, A. Shimizu, M. Osakabe, M. Nishiura, M. Kurachi, S. Kato, S.Satake, K. Itoh, T. Watari, and LHD experiment group
    • Organizer
      23rd International Toki Conference
    • Place of Presentation
      Toki, Japan
    • Related Report
      2013 Annual Research Report
  • [Presentation] Measurement of ion mass density by GAM spectroscopy2013

    • Author(s)
      T. Tokuzawa, S. Inagaki, K. Itoh, S.-I. Itoh, K. Ida, T. Ido, A. Shimizu, A. Fujisawa, H. Yamada, K. Toi, K. Ogawa, M. Isobe, M. Osakabe, K. Tanaka, I. Yamada, S. Morita, M. Goto, S. Sakakibara, Y. Nagayama a, K. Kawahata, and LHD Experiment Group
    • Organizer
      3rd Asia Pacific Transport Working Group (APTWG) International conference
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2013 Annual Research Report
  • [Presentation] Interaction between energetic particle driven n=0 mode and bulk-ions on LHD2012

    • Author(s)
      長壁正樹、井戸毅、他
    • Organizer
      プラズマ核融合学会年会
    • Place of Presentation
      クローバープラザ(福岡県・春日市)
    • Related Report
      2012 Research-status Report
  • [Presentation] Observation of a new energy channel from energetic particles to bulk ions through geodesic acoustic mode2012

    • Author(s)
      井戸毅、長壁正樹、他
    • Organizer
      IAEA Fusion Energy Conference 2012
    • Place of Presentation
      ヒルトン(米国・カリフォルニア・サンディエゴ)
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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