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Effects of energetic-ion-driven MHD instabilities in a reversed magnetic shear plasma on energetic ion transport

Research Project

Project/Area Number 21360457
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

TOI Kazuo  核融合科学研究所, ヘリカル研究部, 教授 (20093057)

Co-Investigator(Kenkyū-buntansha) OSAKABE Masaki  核融合科学研究所, ヘリカル研究部, 准教授 (90280601)
ISOBE Mitsutaka  核融合科学研究所, ヘリカル研究部, 准教授 (00300731)
Co-Investigator(Renkei-kenkyūsha) OHDACHI Satoshi  核融合科学研究所, ヘリカル研究部, 准教授 (00270489)
IDO Takeshi  核融合科学研究所, ヘリカル研究部, 准教授 (50332185)
TOKUZAWA Tokihiko  核融合科学研究所, ヘリカル研究部, 准教授 (90311208)
SHIMIZU Akihiro  核融合科学研究所, ヘリカル研究部, 助教 (00390633)
OZAKI Tetsu  核融合科学研究所, ヘリカル研究部, 准教授 (50183033)
TODO Yasushi  核融合科学研究所, シミュレーション科学研究部, 教授 (00249971)
MATSUNAGA Go  日本原子力研究開発機構, 核融合研究開発部門, 研究員 (10391260)
Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2009: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Keywordsアルファ粒子 / アルヴェン固有モード / 反転磁気シア / 高周波帯状流 / 高速イオン輸送 / 測地線音響モード
Research Abstract

A reversed magnetic shear(RS)-plasma where the shear is positive in plasma central region and negative in the edge region, different from the tokamak RS-plasma was produced in the Large Helical Device(LHD). In such plasma, reversed magnetic shear Alfven eigenmode(RSAE) and geodesic acoustic mode(GAM) were concurrently excited by energetic ions. Characteristics of observed RSAE and GAM, nonlinear coupling of these instabilities, and their impacts on confinement of energetic ions and background bulk plasma were compared with those in tokamaks. The comparison study is important for systematic and comprehensive understanding of these instabilities.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (23 results)

All 2012 2011 2010 2009

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (15 results)

  • [Journal Article] Beam Ion Losses Caused by Magnetic Field Ripples in Various Plasma Parameter Ranges in the Large Helical Device2012

    • Author(s)
      K.Ogawa
    • Journal Title

      Plasma and Fusion Research

      Volume: 7 Issue: 0 Pages: 2402014-2402014

    • DOI

      10.1585/pfr.7.2402014

    • NAID

      130002059616

    • ISSN
      1880-6821
    • Related Report
      2011 Annual Research Report 2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Configuration Effects on Fast Ion Losses Induced by Fast Ion Driven Toroidal Alfven Eigenmodes in the Large Helical Device2012

    • Author(s)
      K. Ogawa, M. Isobe(磯部光孝), K. Toi(東井和夫), et al.
    • Journal Title

      Plasma Science and Technology

      Volume: Vol.14 Issue: 4 Pages: 269-272

    • DOI

      10.1088/1009-0630/14/4/01

    • Related Report
      2011 Annual Research Report 2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Experimental Check of Deceleration of Neutral Beam-Injected Energetic Ions in the HL-2A Tokamak2011

    • Author(s)
      M.Isobe, et al.
    • Journal Title

      Plasma and Fusion Research

      Volume: 6 Issue: 2 Pages: 024008-024008

    • DOI

      10.1088/0741-3335/53/2/024008

    • NAID

      130002059540

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Energetic-ion-driven global instabilities in stellarator/helical plasmas and comparison with tokamak plasmas2011

    • Author(s)
      K.Toi(東井和夫), K.Ogawa(小川国大), M.Isobe(磯部光孝), M.Osakabe(長壁正樹), D.A.Spong(ORNL), Y.Todo
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 53

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observationof energetic-ion losses induced by various MHD instabilities in the Large Helical Device(LHD)2010

    • Author(s)
      K. Ogawa, M. Isobe(磯部光孝), K. Toi(東井和夫), D. A. Spong, A. Shimizu, M. Osakabe(長壁正樹), et al.
    • Journal Title

      Nuclear Fusion

      Volume: Vol.50 Issue: 8 Pages: 084005-084005

    • DOI

      10.1088/0029-5515/50/8/084005

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observation of Reversed-Shear Alfven Eigenmodes Excited by Energetic Ions in a Helical Plasma2010

    • Author(s)
      K. Toi(東井和夫), F. Watanabe, T. Tokuzawa, K. Ida, S. Morita, T. Ido, A. Shimizu, M. Isobe(磯部光孝), M. Osakabe(長壁正樹), et al.
    • Journal Title

      Physical Review Letters

      Volume: Vol.105 Issue: 14

    • DOI

      10.1103/physrevlett.105.145003

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observation of energetic-ion losses induced by various MHD instabilities in the Large Helical Device (LHD)2010

    • Author(s)
      K.Ogawa(小川国大), M.Isobe(磯部光孝), K.Toi(東井和夫), D.A.Spong, A.Sghimizu, M.Osakabe(長壁正樹), et al.
    • Journal Title

      Nuclear Fusion

      Volume: 50

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of Reversed-Shear Alfven Eigenmodes Excited by Energetic Ions in a Helical Plasma2010

    • Author(s)
      K.Toi(東井和夫), F.Watanabe, T.Tokuzawa, K.Ida, S.Morita, T.Ido, A.Shimizu, M Isobe(磯部光孝), M.Osakabe(長壁正樹), et al.
    • Journal Title

      Physical Review Letters

      Volume: 105

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Presentation] LHDプラズマにおける高速イオン励起GAMによる大振幅電位揺動とイオン温度上昇2012

    • Author(s)
      東井和夫、中村充希、井戸毅、清水昭博, 他
    • Organizer
      第67回日本物理学会年次大会、関西学院大学、西宮
    • Place of Presentation
      関西学院大学(口頭発表)
    • Year and Date
      2012-03-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] Studies of Interaction between Energetic Particles and MHD Modes on LHD2012

    • Author(s)
      K.Toi
    • Organizer
      2012 US-Japan MHD workshop "Effect of 3D Magnetic Field on MHD Equilibrium and Stability : Totowa optimum control of toroidal plasmas" and ITPA Topical Group Meeting on Energetic Particles, 5-9 Mar., 2012, Toki, Japan
    • Place of Presentation
      核融合科学研究所(Invited)
    • Year and Date
      2012-03-05
    • Related Report
      2011 Annual Research Report
  • [Presentation] Observation of MHD Instabilities in an Acoustic Range of Frequency in LHD ECRH Plasmas with Suprathermal Electrons2011

    • Author(s)
      M. Isobe(磯部光孝)
    • Organizer
      12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      オースチン(米国)
    • Year and Date
      2011-09-09
    • Related Report
      2011 Final Research Report
  • [Presentation] Magnetic Configuration Effects on TAE Induced Losses and Comparison with Orbit Following Model in LHD2011

    • Author(s)
      K.Ogawa, M.Isobe, K.Toi, D.A.Spong, M.Osakabe
    • Organizer
      12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems, 7-10 Sep., Austin, USA
    • Place of Presentation
      オムニホテル:オースチン・ダウンタウンホテル(Invited)
    • Year and Date
      2011-09-09
    • Related Report
      2011 Annual Research Report
  • [Presentation] Chracteristics of Energetic-Ion-Driven Geodesic Acoustic Modes in the Large Helical Device(LHD)2011

    • Author(s)
      K. Toi(東井和夫)
    • Organizer
      12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      オースチン(米国)
    • Year and Date
      2011-09-07
    • Related Report
      2011 Final Research Report
  • [Presentation] Effect of energetic-particle induced n=0 instabilities to bulk-ions on LHD2011

    • Author(s)
      M. Osakabe(長壁正樹)
    • Organizer
      12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      オースチン(米国)
    • Year and Date
      2011-09-07
    • Related Report
      2011 Final Research Report
  • [Presentation] Characteristics of Energetic-Ion-Driven Geodesic Acoustic Modes in the Large Helical Device (LHD)2011

    • Author(s)
      K.Toi, K.Ogawa, M.Isobe, M.Osakabe, et al
    • Organizer
      12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems, 7-10 Sep., Austin, USA
    • Place of Presentation
      オムニホテル:オースチン・ダウンタウンホテル(Oral)
    • Year and Date
      2011-09-07
    • Related Report
      2011 Annual Research Report
  • [Presentation] Energetic-particle-driven global instabilities in helical plasmas and comparison with tokamak plasmas2011

    • Author(s)
      K.Toi
    • Organizer
      5^<th> ITER International Summer School, 20-24 June, 2011, University Paul Cezanne campus in Aix en Provence, France
    • Place of Presentation
      プロヴァンス大学ポールセザンヌ校(フランス)(Invited)
    • Year and Date
      2011-06-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] Role of Low-Order Rational Surfaces in Transport Barrier Formation on the Large Helical Device2010

    • Author(s)
      K.Toi(東井和夫), F.Watanabe, K.Tanaka, T.Tokuzawa, K.Ogawa, M.Isobe(磯辺光孝), M.Osakabe(長壁正樹), et al.
    • Organizer
      23th IAEA Fusion Energy Conference Daejeon Korea 11-16 Oct.2010;発表番号 PD/P-01
    • Place of Presentation
      デジョン(韓国)
    • Year and Date
      2010-10-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] Role of Low-Order Rational Surfaces in Transport Barrier Formation on the Large Helical Device2010

    • Author(s)
      K. Toi(東井和夫)
    • Organizer
      23th IAEA Fusion Energy Conference
    • Place of Presentation
      Daejeon(韓国)
    • Related Report
      2011 Final Research Report
  • [Presentation] Interplay between Energetic Particles and Alfven Eigenmodes in Toroidal Plasmas2009

    • Author(s)
      K. Toi(東井和夫)
    • Organizer
      17^<th> International Stellarator/Heliotron Workshop
    • Place of Presentation
      プリンストン(米国)
    • Year and Date
      2009-10-16
    • Related Report
      2011 Final Research Report 2009 Annual Research Report
  • [Presentation] Energetic-particle modes driven by suprathermal electrons produced by off-axis second harmonic ECRH in Compact Helical System(CHS)2009

    • Author(s)
      M. Isobe(磯部光孝)
    • Organizer
      11^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      キエフ(ウクライナ)
    • Year and Date
      2009-09-23
    • Related Report
      2011 Final Research Report
  • [Presentation] Reversed Shear Alfven Eigenmodes and Geodesic Acoustic Mode in Reversed Magnetic Shear Configuration with Negative Concavity on the Large Helical Device2009

    • Author(s)
      K. Toi(東井和夫)
    • Organizer
      11^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      キエフ(ウクライナ)
    • Year and Date
      2009-09-22
    • Related Report
      2011 Final Research Report 2009 Annual Research Report
  • [Presentation] Measurement of Fast-Ion losses Induced by Toroidal Alfven Eigenmodes in the Large Helical Device2009

    • Author(s)
      K.Ogawa(小川国大)
    • Organizer
      11^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      キエフ(ウクライナ)
    • Year and Date
      2009-09-22
    • Related Report
      2009 Annual Research Report
  • [Presentation] Clump and Hole formation in the energetic particle spectra by the toroidicity induced Alfven Eigenmodes and their behaviors during the mode activieites2009

    • Author(s)
      M. Osakabe(長壁正樹)
    • Organizer
      11^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
    • Place of Presentation
      キエフ(ウクライナ)
    • Year and Date
      2009-09-21
    • Related Report
      2011 Final Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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