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Optimum injection of electron cyclotron heating

Research Project

Project/Area Number 16K18338
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

Tsujimura Toru  核融合科学研究所, ヘリカル研究部, 助教 (00732744)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords核融合プラズマ / 電子サイクロトロン加熱 / プラズマ加熱 / 大型ヘリカル装置 / リアルタイム制御 / 偏波 / デポジション位置 / ミリ波 / プラズマ・核融合
Outline of Final Research Achievements

Optimum injection of electron cyclotron heating (ECH) was conducted in LHD (Large Helical Device) plasmas. Maximizing the single-pass absorption power is a key for localized heating and improving its controllability. We found that peripheral plasmas outside the last closed flux surface of the LHD affect optimization of ECH, then developed the ray-tracing code which includes those effects, and finally improved the heating efficiency. The real-time control system of the ECH injection settings was developed with FPGA (Field Programmable Gate Array), based on the dependence of the optimum ECH settings on peripheral plasmas. We demonstrated to improve the single-pass absorption efficiency by controlling the incident polarization and the deposition locations of the EC waves in real time.

Academic Significance and Societal Importance of the Research Achievements

学術的意義は、電磁波と電子との相互作用を評価する数値計算モデルを基にしたECH入射系のリアルタイム制御により、ECHの一回通過吸収効率を向上することが可能となったことである。これにより核融合プラズマの高性能化だけでなく、高パワー加熱による炉内機器の損傷防止にもつながる結果となった。社会的意義は、核融合炉の早期実現に向けて、プラズマの加熱性能に優れたECHの炉への適用の妥当性・実現性の向上につながることである。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (15 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (12 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results)

  • [Journal Article] LHDにおける電子サイクロトロン波の入射偏波の最適化2019

    • Author(s)
      辻村亨
    • Journal Title

      プラズマ・核融合学会誌

      Volume: 95 Pages: 139-144

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] Real-time control of electron cyclotron wave polarization in the LHD2018

    • Author(s)
      Ii Tsujimura T.、Mizuno Y.、Tokuzawa T.、Ito Y.、Kubo S.、Shimozuma T.、Yoshimura Y.、Igami H.、Takahashi H.、Ejiri A.
    • Journal Title

      Fusion Engineering and Design

      Volume: 131 Pages: 130-134

    • DOI

      10.1016/j.fusengdes.2018.04.062

    • NAID

      120007180021

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system2017

    • Author(s)
      Toru Ii Tsujimura, Hiroshi Idei, Shin Kubo, Sakuji Kobayashi
    • Journal Title

      Fusion Engineering and Design

      Volume: 114 Pages: 97-101

    • DOI

      10.1016/j.fusengdes.2016.11.019

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 大型ヘリカル装置における電子サイクロトロン加熱の入射最適化に関する研究2019

    • Author(s)
      辻村亨
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Real-time injection control of electron cyclotron resonance heating power in LHD2019

    • Author(s)
      T. Tsujimura, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, R. Yanai, K. Yanagihara
    • Organizer
      23rd Topical Conference on Radiofrequency Power in Plasmas
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-time control of ECH operation in LHD2019

    • Author(s)
      T. Tsujimura
    • Organizer
      22nd ITPA Integrated Operation Scenarios Topical Group Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] LHDにおける入射EC波の偏波のリアルタイム制御2018

    • Author(s)
      辻村亨、水野嘉識、徳澤季彦、伊藤康彦、久保伸、下妻隆、吉村泰夫、伊神弘恵、高橋裕己、江尻晶、LHD実験グループ
    • Organizer
      第12回核融合エネルギー連合講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Real-time control of ECRH polarization in LHD2018

    • Author(s)
      T. I. Tsujimura, Y. Mizuno, T. Tokuzawa, Y. Ito, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, A. Ejiri
    • Organizer
      2018 US-EU-Japan RF Heating Technology Workshop / US-Japan Workshop on RF Heating Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] LHDにおける電子サイクロトロン共鳴加熱の最適入射2018

    • Author(s)
      辻村亨、久保伸、下妻隆、吉村泰夫、伊神弘恵、高橋裕己、長壁正樹
    • Organizer
      第35回プラズマ・核融合学会年会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Real-time control of EC wave polarization in the LHD2018

    • Author(s)
      T. I. Tsujimura, Y. Mizuno, T. Tokuzawa, Y. Ito, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, A. Ejiri, the LHD Experiment Group
    • Organizer
      Japan-Korea Workshop on "Physics and Technology of Heating and Current Drive in Fusion Plasmas"
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study of optimum injection of ECH for high electron temperature plasmas in the Large Helical Device2017

    • Author(s)
      T. Tsujimura, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, R. Makino
    • Organizer
      22nd Topical Conference on Radiofrequency Power in Plasmas
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 電子サイクロトロン共鳴加熱に用いる偏波器や導波管のコルゲート溝設計2016

    • Author(s)
      辻村亨、出射浩、久保伸、小林策治
    • Organizer
      第33回プラズマ・核融合学会年会
    • Place of Presentation
      東北大学青葉山キャンパス(宮城県仙台市)
    • Year and Date
      2016-11-29
    • Related Report
      2016 Research-status Report
  • [Presentation] Impact of the LHD Peripheral Region and the Magnetic Axis Shift on Optimal On-Axis ECRH Injection for High-Electron-Temperature Plasmas2016

    • Author(s)
      T. I. Tsujimura, S. Kubo, H. Igami, R. Makino, H. Takahashi, T. Shimozuma, Y. Yoshimura, R. Seki, M. Yokoyama, M. Osakabe, T. Mutoh
    • Organizer
      26th IAEA Fusion Energy Conference
    • Place of Presentation
      国立京都国際会館(京都府京都市)
    • Year and Date
      2016-10-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Refraction and O/X mode coupling of EC waves in LHD peripheral plasmas2016

    • Author(s)
      T. I. Tsujimura, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, R. Makino, R. Seki, and the LHD Experiment Group
    • Organizer
      US-Japan Workshop on RF Heating Physics 2016
    • Place of Presentation
      ボルファートとやま(富山県富山市)
    • Year and Date
      2016-05-18
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recent Progress of ECRH plasma in LHD2016

    • Author(s)
      Toru Tsujimura
    • Organizer
      19th Joint Workshop on ECE and ECRH (EC-19)
    • Place of Presentation
      Ahmedabad, India
    • Year and Date
      2016-04-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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