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Evaluation and Analysis of Transport Characteristics of Large-Current High-Temperature Superconducting Conductors for Fusion Reactor

Research Project

Project/Area Number 19K14691
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Onodera Yuta  核融合科学研究所, 研究部, 助教 (70823847)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords高温超伝導線材 / 高温超伝導導体 / 磁化計測 / 非破壊検査 / 磁化測定 / 欠陥検出手法
Outline of Research at the Start

本研究の概要は、核融合炉用超伝導マグネットに用いられる高温超伝導(HTS)導体の設計技術を確立させるために、(1) HTS線材の通電特性を非破壊・非接触でかつ自動的に評価し解析可能なシステムを作製し、通電特性のデータベースを構築する。そして、(2) 積層させ捻りを加えた大電流HTS導体を設計・試作するとともに、磁化測定を用いた新たな導体評価技術を開発し、導体の通電特性および電流偏流の挙動を実験的に明らかにする研究である。

Outline of Final Research Achievements

This study aims to develop large-current, high-temperature superconducting conductors for fusion reactor magnets. The research focuses on thoroughly evaluating the current-carrying characteristics of the strands, prototyping the conductors, and establishing non-destructive, non-contact techniques for assessing the current-carrying characteristics of the conductors themselves. To achieve these objectives, we developed an apparatus utilizing pickup coils to evaluate the current-carrying characteristics of the strands under various magnetic fields, temperatures, and magnetic field application angles. Additionally, we proposed an evaluation method based on magnetization techniques using the rotational magnetization method. The critical current value of the prototype conductor was assessed based on the obtained current-carrying characteristics of the strands. Furthermore, we demonstrated that the rotational magnetization method enables the evaluation of defect positions within the strands.

Academic Significance and Societal Importance of the Research Achievements

核融合炉用マグネットに用いられる高温超伝導線材は、従来線材を凌駕する高磁界特性を有している。そのため大電流領域では一般的な通電法による測定が困難となる。そこで相補的な手法として磁化法を用いた計測装置を製作した。ピックアップコイルと回転磁化法により任意の磁場・温度・磁場印加角度における素線の通電特性を評価可能となる。また、導体の健全性を非破壊・非接触で評価する手法は、導体そのものが開発段階であることから確立できていない。そこで、回転磁化法を用いた本評価手法を適用することで劣化位置を把握でき、導体開発へのフィードバックにつなげることができると考える。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (14 results)

All 2023 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Development of a Compact HTS-FAIR Conductor for Magnet Application2023

    • Author(s)
      Onodera Yuta、Hirano Naoki、Baba Tomosumi、Mito Toshiyuki、Kawanami Ryozo
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2023.3254492

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel HTS coil protection method using secondary windings as a quench heater2020

    • Author(s)
      Onodera Y、Mito T、Takahata K、Hirano N
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1559 Issue: 1 Pages: 012118-012118

    • DOI

      10.1088/1742-6596/1559/1/012118

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rotating magnetization method for inspection of local defect in HTS conductor2020

    • Author(s)
      [1]Yuta Onodera, Toshiyuki Mito, Naoki Hirano
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1857 Pages: 012012-012012

    • NAID

      120007191886

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 縮小版FAIR導体の開発と通電特性の評価2022

    • Author(s)
      小野寺優太、平野直樹、成嶋吉朗、馬場智澄、三戸利行、川並良造
    • Organizer
      2022年度春季低温工学・超電導学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of a Compact HTS-FAIR Conductor for Magnet Application2022

    • Author(s)
      Yuta Onodera, Naoki Hirano, Tomosumi Baba, Toshiyuki Mito, Ryozo Kawanami
    • Organizer
      Applied Superconductivity Conference 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大電流HTS導体(FAIR導体)における端部製作と接触抵抗評価2021

    • Author(s)
      小野寺優太、三戸利行、平野直樹、馬場智澄、川並良造
    • Organizer
      2021年度春季低温工学・超電導学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Current- transport properties of HTS-FAIR conductor at variable temperatures in high magnetic field2021

    • Author(s)
      Yuta Onodera, Toshiyuki Mito, Naoki Hirano, Kazuya Takahata, Nagato Yanagi, Akifumi Iwamoto, Hirotaka Chikaraishi, Shinji Hamaguchi, Suguru Takada, Tomosumi Baba, Noriko Chikumoto, Akifumi Kawagoe, Ryozo Kawanami
    • Organizer
      27th International Conference on Manget Technology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] New HTS conductors testing facility with 4.2 K - 50 K variable temperature insert in 9 T magnetic field2020

    • Author(s)
      Yuta Onodera, Naoki Hirano, Tomosumi Baba, Maki Otsuji, Shinji Hamaguchi, Hirotaka Chikaraishi, Toshiyuki Mito
    • Organizer
      The 29th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] HTS magnet protection method by use of secondary windings as a quench heater for experimental fusion device2020

    • Author(s)
      Yuta Onodera, Toshiyuki Mito, Kazuya Takahata, Naoki Hirano
    • Organizer
      Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] REBCO線材を積層させた導体中における欠陥検出手法の検討2020

    • Author(s)
      小野寺優太、三戸利行、平野直樹
    • Organizer
      2020年度春季低温工学・超電導学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Rotating magnetization method for inspection of local defect in HTS conductor2020

    • Author(s)
      Yuta Onodera, Toshiyuki Mito, Naoki Hirano
    • Organizer
      10th ACASC / 2nd ASIAN-ICMC /CSSJ Joint Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Novel HTS coil protection method using secondary windings as a quench heater2019

    • Author(s)
      Yuta Onodera, Toshiyuki Mito, Kazuya Takahata, Naoki Hirano
    • Organizer
      14th European Conference on Applied Superconductivity
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Non-destructive inspection of local defect in HTS conductor by using magnetization method2019

    • Author(s)
      Yuta Onodera, Toshiyuki Mito, Naoki Hirano
    • Organizer
      The 28th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2次巻線をクエンチヒーターとして用いた超伝導マグネット保護方式の検討2019

    • Author(s)
      小野寺 優太、三戸 利行、平野 直樹、高畑 一也
    • Organizer
      第98回 低温工学・超電導学会研究発表会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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