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低アスペクト比RFPプラズマにおける自発電流に関する研究

Research Project

Project/Area Number 09J09943
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Nuclear fusion studies
Research InstitutionKyoto Institute of Technology

Principal Investigator

大木 健輔  京都工芸繊維大学, 工芸科学研究科, 特別研究員(DC1)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2011: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2010: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2009: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsRFP / 低アスペクト比 / 自発電流 / ブートストラップ電流 / 高ベータ / RELAX / 誤差磁場 / プラズマ
Research Abstract

低アスペクト比RFPプラズマ装置「RELAX」において、高い自発電流割合を実現するための高性能化、すなわち高い電子温度、電子密度、ベータ値を目的とした装置の改造を完了させた。改造項目の一つである真空容器分割用ポロイダルフランジの改良により不整磁場が減少し、それにより、RFPプラズマがヘリカルに変形するQSH(準シングルヘリシティ)状態の発生率、持続時間が上昇した。このQSH状態はRFPの高閉じ込め性能化、高ベータ化へと繋がる重要な候補である。また、他の改造項目であるサドルコイル(アクチュエータコイル4×16個、センサーコイル8×16個)の配線や、そのフィードバック制御電源の開発、初期動作実験等を他の人と共同で行った。このサドルコイルフィードバックシステムにより、不整磁場が抑制され、プラズマの安定性やベータ値が向上するものと期待される。また、電子温度、密度分布を測定するための軟X線ダブルフィルター法装置、トムソン散乱計測装置、ダブルプローブ装置、140GHz干渉計等の開発、改良を他の人と協力して遂行し、電子温度分布の時間発展、中心電子温度等の測定に成功した。これは、自発電流の評価に必要な電子温度、密度分布の測定が大きく前進したことを意味する。また、プラズマを生成、制御する種々のコイル系の回路定数を種々に調整して、RFP状態の持続時間や温度、ベータ値等が最適になるプラズマを探索した。以上のように、低アスペクト比RFPにおける自発電流値の評価と高い自発電流割合の実現に関して、本研究は大きく貢献した。

Report

(3 results)
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (17 results)

All 2011 2010 2009

All Journal Article (10 results) (of which Peer Reviewed: 9 results) Presentation (7 results)

  • [Journal Article] Initial Result of Successive SXR Imaging Measurement in Low-A RFP2011

    • Author(s)
      Akio SANPEI, Kensuke OKI, Mitsuru NAKAMURA, Akio HIGASHI, Hidehiko MOTOI, Daisuke FUKAHORI, Haruhiko HIMURA, Sadao MASAMUNE, Satoshi OHDACHI, Nobuhiro NISHINO, Takumi ONCHI, Ryuya IKEZOE
    • Journal Title

      Plasma and Fusion Research

      Volume: 6 Pages: 2406096-2406096

    • DOI

      10.1585/pfr.6.2406096

    • NAID

      130002059603

    • ISSN
      1880-6821
    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of Helical Structure by Imaging Diagnostics in a Low-Aspect-Ratio Reversed Field Pinch2011

    • Author(s)
      Takumi ONCHI, Ryuya IKEZOE, Kensuke OKI, Akio SANPEI, Haruhiko HIMURA, Sadao MASAMUNE, Nobuhiro NISHINO, Haruhisa KOGUCHI
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: Vol.80 Issue: 11 Pages: 80-80

    • DOI

      10.1143/jpsj.80.114501

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tangential Image of Helical SXR Emissivity Structure in Low-Aspect-Ratio RFP2011

    • Author(s)
      Akio Sanpei, Kensuke Oki, Mitsuru Nakamura, Akio Higashi, Hidehiko Motoi, Daisuke Fukahori, Haruhiko Himura, Sadao Masamune, Satoshi Ohdachi, Nobuhiro Nishino, Takumi Onchi, Ryuya Ikezoe
    • Journal Title

      IEEE TRANSACTIONS ON PLASMA SCIENCE

      Volume: Vol.39 Issue: 11 Pages: 2410-2411

    • DOI

      10.1109/tps.2011.2160369

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tangential soft-x ray imaging for three-dimensional structural studies in a reversed field pinch2010

    • Author(s)
      T.Onchi, R.Ikezoe, K.Oki, A.Sanpei, H.Himura, S.Masamune
    • Journal Title

      REVIEW OF SCIENTIFIC INSTRUMENTS

      Volume: Volume 81

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Density Regimes of Low-Aspect-Ratio RFP Plasmas in RELAX2010

    • Author(s)
      Masaki SUGIHARA, Kensuke OKI, Ryuya IKEZOE, Takumi ONCHI, Akio SANPEI, Haruhiko HIMURA, Sadao MASAMUNE, Tsuyoshi AKIYAMA, Akira EJIRI, Keishi SAKAMOTO, Kazunobu NAGASAKI, Vladimir ZHURAVLEV
    • Journal Title

      Plasma and Fusion Research

      Volume: Volume 5

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recent Progress in Low-A RFP Plasma Research in RELAX2010

    • Author(s)
      Akio SANPEI, Ryuya IKEZOE, Takumi ONCHI, Kensuke OKI, Masaki SUGIHARA, Yuusuke KONISHI, Shin-ichi FUJITA, Mitsuru NAKAMURA, Akio HIGASHI, Hidehiko MOTOI, Haruhiko HIMURA, Sadao MASAMUNE
    • Journal Title

      Plasma and Fusion Research

      Volume: Volume 5

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extended operational regimes and MHD behavior in a low-aspect-ratio reversed field pinch in RELAX2010

    • Author(s)
      R.Ikezoe, K.Oki, T.Onchi, Y.Konishi, M.Sugihara, S.Fujita, A.Sanpei, H.Himura, S.Masamune
    • Journal Title

      PLASMA PHYSICS AND CONTROLLED FUSION

      Volume: Volume 53

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MHD Properties of Low-aspect Ratio RFP in RELAX2009

    • Author(s)
      S.Masamune, A.Sanpei, R.Ikezoe, T.Onchi, K.Oki, T.Yamashita, H.Shimazu, H.Himura, R.Paccagnella
    • Journal Title

      Journal of Fusion Energy Vol.28

      Pages: 187-190

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Characterization of MHD behavior in a low-aspect ratio RFP2009

    • Author(s)
      R.IKEZOE, T.ONCHI, K.OKI, A.SANPEI, H.HIMURA, S.MASAMUNE
    • Journal Title

      Jouranl of Plasma and Fusion Research SERIES Vol.8

      Pages: 1031-1035

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of equilibria in a low-aspect-ratio RFP2009

    • Author(s)
      A.SANPEI, K.OKI, R.IKEZOE, T.Onchi, H.SHIMAZU, T.YAMASHITA, H.HIMURA, S.MASAMUNE
    • Journal Title

      Journal of Plasma and Fusion Research SERIES Vol.8

      Pages: 1066-1069

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] 低アスペクト比RFP装置RELAXの改造と最適化2011

    • Author(s)
      大木健輔
    • Organizer
      Plasma Conference 2011
    • Place of Presentation
      石川県立音楽堂(石川県)
    • Year and Date
      2011-11-23
    • Related Report
      2011 Annual Research Report
  • [Presentation] Progress in characterization of low-A RFP plasmas2011

    • Author(s)
      Kensuke Oki
    • Organizer
      15th IEA/RFP Workshop
    • Place of Presentation
      Wisconsin Institutes for Discovery, Madison(米国)
    • Year and Date
      2011-10-11
    • Related Report
      2011 Annual Research Report
  • [Presentation] 低アスペクト比RFPプラズマの放電特性と最適化2010

    • Author(s)
      大木健輔
    • Organizer
      プラズマ核融合学会第27回年会
    • Place of Presentation
      北海道大学学術交流会館(北海道)
    • Year and Date
      2010-11-30
    • Related Report
      2010 Annual Research Report
  • [Presentation] Experimental Research on Low-Aspect-Ratio Reversed Field Pinch2010

    • Author(s)
      Kensuke Oki
    • Organizer
      The 5th Japan-Korea Seminar on Advanced Diagnostics for Steady-State Fusion Plasma
    • Place of Presentation
      九州地区国立大学九重共同研修所(大分県九重町)
    • Year and Date
      2010-08-28
    • Related Report
      2010 Annual Research Report
  • [Presentation] 低アスペクト比RFPプラズマにおけるヘリカルオーミック配位2009

    • Author(s)
      大木健輔
    • Organizer
      平成21年度核融合科学研究所共同研究会「能動的制御による自己組織化高ベータプラズマの性能改善」
    • Place of Presentation
      核融合科学研究所(岐阜県)
    • Year and Date
      2009-12-24
    • Related Report
      2009 Annual Research Report
  • [Presentation] 低アスペクト比RFPプラズマにおけるヘリカルオーミック配位2009

    • Author(s)
      大木健輔
    • Organizer
      プラズマ核融合学会第26回年会
    • Place of Presentation
      京都市国際交流会館(京都府)
    • Year and Date
      2009-12-04
    • Related Report
      2009 Annual Research Report
  • [Presentation] Rotating Helical Ohmic Configuration in a Low-Aspect-Ratio Reversed Field Pinch2009

    • Author(s)
      Kensuke Oki
    • Organizer
      51st Annual Meeting of the American Physical Society Division of Plasma Physics
    • Place of Presentation
      Hyatt Regency Atlanta (アメリカ、アトランタ)
    • Year and Date
      2009-11-05
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2024-03-26  

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