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Development of gradient-curvature measurements and study of spatio-temporal structure

Research Project

Project/Area Number 26630474
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

TOKUZAWA TOKIHIKO  核融合科学研究所, ヘリカル研究部, 准教授 (90311208)

Co-Investigator(Renkei-kenkyūsha) KOGI Yuichiro  福岡工業大学, 工学部, 教授 (10398109)
SHIMIZU Akihiro  核融合科学研究所, ヘリカル研究部, 助教 (00390633)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsプラズマ計測 / ミリ波 / 勾配 / 曲率 / 時空間構造
Outline of Final Research Achievements

We developed the diagnostics system for measuring the gradient and curvature of the electron temperature and the electron density profiles in high-temperature plasma. Because the gradient and curvature of the plasma are considered to affect the plasma confinement, this measurement is important for the the study of fusion plasma science. We performed the diagnostics in the large helical device (LHD) plasma and have successfully obtained the temporal behavior of these parameter. Comparing with the conventional diagnostics, the characteristics of this technique has been clarified.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (16 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 4 results) Presentation (12 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results)

  • [Journal Article] Turbulence in edge and core transport barriers: new experimental results and modeling2017

    • Author(s)
      T.Tokuzawa
    • Journal Title

      Nuclear Fusion

      Volume: 57 Issue: 2 Pages: 025001-025001

    • DOI

      10.1088/0029-5515/57/2/025001

    • NAID

      120007149369

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Distorted magnetic island formation during slowing down to mode locking in helical plasmas2017

    • Author(s)
      T. Tokuzawa, Y. Takemura, K.Y. Watanabe, S. Sakakibara, Y. Narushima, H. Tsuchiya, Y. Nagayama, S. Inagaki, K. Ida, M. Yoshinuma, K. Tanaka, Y. Suzuki, I. Yamada, and the LHD Experiment Group
    • Journal Title

      Nuclear Fusion

      Volume: 57 Issue: 7 Pages: 076003-076003

    • DOI

      10.1088/1741-4326/aa6d26

    • NAID

      120007029203

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Developments of frequency comb microwave reflectometer for the interchange mode observations in LHD plasma2016

    • Author(s)
      R. Soga, T. Tokuzawa, K.Y. Watanabe, K. Tanaka, I. Yamada, S. Inagaki and N. Kasuya
    • Journal Title

      Journal of Instrumentation

      Volume: 11 Issue: 02 Pages: C02009-C02009

    • DOI

      10.1088/1748-0221/11/02/c02009

    • NAID

      120007180053

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Observation of electron temperature turbulence with a correlation electron cyclotron emission radiometer on LHD2016

    • Author(s)
      Y. Kogi, T. Higashi, N. Tamura, H. Tsuchiya, D. Kuwahara, Y. Nagayama, A. Mase, K. Takehara and T. Tokuzawa
    • Journal Title

      Journal of Instrumentation

      Volume: Vol. 11 Issue: 01 Pages: C01072-C01072

    • DOI

      10.1088/1748-0221/11/01/c01072

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] LHDにおけるロックドモード様不安定性発現時のプラズマ回転速度変化の観測2016

    • Author(s)
      徳沢季彦, 武村勇輝, 渡邊清政, 居田克巳, 吉沼幹朗, 榊原悟, 成嶋吉朗, 土屋隼人, 長山好夫, LHD実験グループ
    • Organizer
      第33回 プラズマ・核融合学会 年会
    • Place of Presentation
      東北大学
    • Year and Date
      2016-11-29
    • Related Report
      2016 Annual Research Report
  • [Presentation] Magnetic island formation in locked-like mode in helical plasmas2016

    • Author(s)
      T. Tokuzawa, Y. Takemura, K.W. Watanabe, S. Sakakibara, Y. Narushima, H. Tsuchiya, Y. Nagayama, S. Inagaki, K. Ida, M. Yoshinuma, K. Tanaka, Y. Suzuki, I. Yamada, and LHD Experiment Group
    • Organizer
      26th IAEA Fusion Energy Conference
    • Place of Presentation
      京都
    • Year and Date
      2016-10-17
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of oscillation of poloidal rotation velocity in LHD2016

    • Author(s)
      T. Tokuzawa, Y. Takemura, K.W. Watanabe, S. Inagaki, K. Ida, M. Yoshinuma, S. Sakakibara, Y. Narushima, H. Tsuchiya, Y. Nagayama, K. Tanaka, I. Yamada, and LHD Experiment Group
    • Organizer
      18th International Congress on Plasma Physics
    • Place of Presentation
      Kaohsiung, Taiwan
    • Year and Date
      2016-06-27
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マイクロ波計測器から得られる大規模データを用いた乱流プラズマの特性抽出法の開発2016

    • Author(s)
      徳沢季彦
    • Organizer
      RIAMフォーラム2016
    • Place of Presentation
      九州大学
    • Year and Date
      2016-06-02
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 磁場閉じ込めプラズマの周辺部ポロイダル速度の時空間構造変化の観測2016

    • Author(s)
      徳沢季彦,曽我良太,竹原啓太,稲垣滋,小波蔵純子,吉川正志,居田克巳, 渡邊清政,武村勇輝,土屋隼人,LHD実験グループ
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      東北学院大学 泉キャンパス
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] 高空間分解ECE計測のためのLHD真空容器内に設置する金属レンズアンテナの開発2016

    • Author(s)
      竹原啓太 , 徳沢季彦, 渡邉清政, LHD実験グループ
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      東北学院大学 泉キャンパス
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Turbulence in edge and core transport barriers, new experimental results and modeling2015

    • Author(s)
      T.Tokuzawa
    • Organizer
      15th International Workshop on H-mode Physics and Transport Barriers
    • Place of Presentation
      Garching, Germany
    • Year and Date
      2015-10-19
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Application study for magnetically confined fusion plasma diagnostics using pulsed terahertz waves2015

    • Author(s)
      T. Tokuzawa, Y. Kadoya, M. Tani, K. Yamamoto,M. Hangyo, H. Kitahara, J. Kohagura, M. Yoshikawa, H. Idei, M. Nishiura, K. Tanaka, I. Yamada, and K. Kawahata
    • Organizer
      17th International Symposium on Laser-Aided Plasma Diagnostics
    • Place of Presentation
      Sapporo, Japan
    • Year and Date
      2015-09-27
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Upgraded Frequency Comb Reflectometer System Utilizing Both Ka-band and U-band Microwave in LHD2015

    • Author(s)
      T. Tokuzawa, R. Soga, S. Inagaki, K. Y. Watanabe, K. Tanaka, I. Yamada, N. Kasuya, K. Ida, K. Itoh, A. Ejiri, K. Kawahata, and LHD Experiment Group
    • Organizer
      12th International Reflectometry Workshop
    • Place of Presentation
      Jülich, Germany
    • Year and Date
      2015-05-18
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] LHDプラズマにおける交換型不安定性の観測とその構造に関する研究2015

    • Author(s)
      曽我良太,徳沢季彦,渡邊清政
    • Organizer
      日本物理学会 第70回年次大会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] マイクロ波計測器信号からの乱流揺動信号抽出法の研究2015

    • Author(s)
      徳沢季彦
    • Organizer
      九州大学応用力学研究所研究会「プラズマ乱流実験の大容量データからの物理情報抽出新手法の開発」
    • Place of Presentation
      九州大学
    • Year and Date
      2015-02-27
    • Related Report
      2014 Research-status Report
  • [Presentation] Multi-point Measurements for Study of Plasma Turbulence in the LHD2014

    • Author(s)
      T. Tokuzawa, S. Inagaki, A. Ejiri, R. Soga, I.Yamada, S. Kubo, M.Yoshinuma, K. Ida, C.Suzuki, K. Tanaka, T. Akiyama, N. Kasuya, K. Itoh, K.Watanabe, H. Yamada, K. Kawahata, and LHD EXPERIMENT GROUP
    • Organizer
      Plasma Conference 2014
    • Place of Presentation
      朱鷺メッセ、新潟県
    • Year and Date
      2014-11-18 – 2014-11-21
    • Related Report
      2014 Research-status Report
    • Invited

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Published: 2014-04-04   Modified: 2018-03-22  

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