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High-temperature-superconductor technology toward high-speed and high-field beam scanning magnets for heavy-ion cancer therapy

Research Project

Project/Area Number 20H00245
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionKyoto University

Principal Investigator

Amemiya Naoyuki  京都大学, 工学研究科, 教授 (10222697)

Co-Investigator(Kenkyū-buntansha) 曽我部 友輔  京都大学, 工学研究科, 助教 (40847216)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥44,720,000 (Direct Cost: ¥34,400,000、Indirect Cost: ¥10,320,000)
Fiscal Year 2023: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2022: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2021: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2020: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywords超伝導 / 電磁石 / 加速器 / がん治療 / 交流 / 交流損失 / 遮蔽電流磁界
Outline of Research at the Start

高温超伝導線を用いて重粒子線がん治療用スキャニング電磁石を実現する高速変動高磁界発生技術を構築する。マルチフィラメント化し銅分流層を複合した薄膜高温超伝導線を円形コアに多層巻きするSCSCケーブルを用いてコイルを巻くことにより、交流損失、磁界精度劣化、高い端子電圧というボトルネックを解決する。SCSCケーブルで巻いたコイルと鉄ヨークにより構成した電磁石の電磁現象を解明し、交流損失・遮蔽電流磁界低減指針を構築する。これに基づき、重粒子線がん治療用スキャニング電磁石に適用可能な高速変動高磁界電磁石技術を構築し、200 Hz, 1 T,磁界精度0.2%のスキャニング電磁石の概念設計を行う。

Outline of Final Research Achievements

We have developed a conceptual design of high-speed and high-field beam scanning magnets for heavy-ion cancer therapy.
By winding coils using SCSC cables, in which multifilamented and copper-plated high-temperature superconducting coated conductor are multilayered wound around a circular core, we have solved the following bottlenecks: ac loss due to the movement of fluxoids during magnetic field changing, deterioration of magnetic field accuracy due to large antimagnetization caused by the tape shape of the coated conductors, and high terminal voltage due to large interlinkage flux and high frequency. Through a combined approach of experiments and electromagneitc field analyses, we clarified the electromagnetic phenomena of magnets composed of coils wound with SCSC cables and iron yokes, and established guidelines for reducing ac losses and shielding-current-induced fields.

Academic Significance and Societal Importance of the Research Achievements

銅分流層複合マルチフィラメント薄膜高温超伝導線をスパイラル状に巻いた導体であるSCSCケーブルを用いて高速変動高磁界電磁石技術の構築をはかるという独自性の高い研究である。また、周波数200 Hz、磁束密度1 Tの高速変動高磁界を大空間に発生する技術は存在せず、これまでほぼ直流の応用に限定されていた超伝導電磁石の応用領域を200 Hzという高速変動高磁界の発生に大きく広げる可能性を秘めた成果であり、本研究の研究成果の学術的意義は大きい。
さらに、本研究の成果をもとに回転ガントリーの格段の小型化を通して重粒子線がん治療の普及が進むことが期待され、健康長寿社会に貢献するという大きな社会的意義をもつ。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (22 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (16 results) (of which Int'l Joint Research: 12 results,  Invited: 1 results)

  • [Int'l Joint Research] ローレンスバークレー国立研究所/ブルックヘブン国立研究所(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ローレンスバークレー国立研究所/ブルックヘブン国立研究所(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Conceptual Design of Scanning Magnets Using HTS Coils Wound With Spiral Copper-Plated Striated Coated-Conductor (SCSC) Cables for Carbon-ion Radiotherapy2023

    • Author(s)
      Li Yang、Sogabe Yusuke、Iwata Yoshiyuki、Amemiya Naoyuki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3243874

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Shielding Currents in Coated Conductors on Field Quality of Iron-Dominated HTS Magnets Estimated by Numerical Analyses2023

    • Author(s)
      Li Yang、Sogabe Yusuke、Amemiya Naoyuki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3251300

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Field Drifts of Small HTS Dipole Magnet Under Repeated Excitation2022

    • Author(s)
      Yusuke Sogabe, Koki Wakabayashi, Naoyuki Amemiya
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 4 Pages: 1-6

    • DOI

      10.1109/tasc.2022.3141967

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Simplified Numerical Electromagnetic Field Analysis Method of Coils Wound With Spiral Coated-Conductor Cables2022

    • Author(s)
      Yusuke Sogabe, Rikito Takahashi, Naoyuki Amemiya
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 4 Pages: 1-5

    • DOI

      10.1109/tasc.2022.3141974

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fabrication, characterizations, and design studies of SCSC cables2023

    • Author(s)
      N. Amemiya
    • Organizer
      International Workshop on Coated Conductors for Applications (CCA 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical electromagnetic field analyses of SCSC cables carrying dc current under ac magnetic fields aiming to flux pump applications2023

    • Author(s)
      Y. Sogabe, S. Honda, N. Amemiya
    • Organizer
      The 36th International Symposium on Superconductivity (ISS 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Conceptual design of scanning magnets using HTS coils wound with spiral copper-plated striated coated-conductor (SCSC) cables for carbon-ion radiotherapy2022

    • Author(s)
      Y. Li, Y. Sogabe, Y. Iwata, N. Amemiya
    • Organizer
      2022 Applied Superconductivity Conference (ASC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of shielding currents in coated conductors on field quality of iron-dominated HTS magnets estimated by numerical analyses2022

    • Author(s)
      Y. Li, Y. Sogabe, N. Amemiya
    • Organizer
      2022 Applied Superconductivity Conference (ASC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Large-scale electromagnetic field analysis for a finite-long spiral copper-plated striated coated-conductor cable without translational symmetry and its applications2022

    • Author(s)
      Y. Sogabe, T. Hattori, N. Amemiya
    • Organizer
      2022 Applied Superconductivity Conference (ASC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AC loss measurements of copper-plated multifilament coated conductors carrying ac transport current and exposed to ac magnetic field2022

    • Author(s)
      M. Shigemasa, A. Takahashi, Y. Sogabe, N. Amemiya
    • Organizer
      2022 Applied Superconductivity Conference (ASC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experiments and numerical analyses of dynamic resistivities in copper-plated multifilament coated conductors2022

    • Author(s)
      Y. Sogabe, N. Amemiya
    • Organizer
      2022 Applied Superconductivity Conference (ASC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SCSC ケーブルで構成されるスキャニング電磁石の概念設計2022

    • Author(s)
      李陽,曽我部友輔, 岩田佳之, 雨宮尚之
    • Organizer
      第103回2022年度春季低温工学・超電導学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 銅分流層複合マルチフィラメント薄膜高温超伝導線の動的抵抗測定2022

    • Author(s)
      曽我部友輔,陳妙しん,雨宮尚之
    • Organizer
      第103回2022年度春季低温工学・超電導学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 遮蔽電流が鉄支配型高温超伝導マグネットの発生磁界に与える影響の解析的評価2022

    • Author(s)
      李 陽, 曽我部 友輔, 雨宮 尚之
    • Organizer
      第104回2022年度秋季低温工学・超電導学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Magnetization loss measurements of various copper-plated multifilament coated conductors2021

    • Author(s)
      Mao Shigemasa
    • Organizer
      The 15th European Conference on Applied Superconductivity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical electromagnetic field analyses and measurements field quality of HTS dipole magnets under repeated excitation2021

    • Author(s)
      Yusuke Sogabe
    • Organizer
      The 15th European Conference on Applied Superconductivity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simplified numerical electromagnetic field analysis method of coils wound with spiral coated conductor cables2021

    • Author(s)
      Yusuke Sogabe
    • Organizer
      The 15th European Conference on Applied Superconductivity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CORC 導体で構成されるコイルを対象とする数値電磁界解析における簡略化手法に関する検討2021

    • Author(s)
      曽我部 友輔
    • Organizer
      第101回2021年度春季低温工学・超電導学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Comparison of AC loss of superferric magnets consisting of HTS coils wound with stack cables and wound with CORC wires by using 3D electromagnetic field analyses2020

    • Author(s)
      Y. Sogabe, M. Yasunaga, Y. Li, Y. Ishi, and N. Amemiya
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A quasi-3D model for SCIF calculations of accelerator magnets wound with CORC wires2020

    • Author(s)
      Y. Sogabe and N. Amemiya
    • Organizer
      The 33rd International Symposium on Superconductivity (ISS 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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