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Development of fine shimming technique for precision physic measurements

Research Project

Project/Area Number 18H01239
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

SASAKI Ken-ichi  大学共同利用機関法人高エネルギー加速器研究機構, 超伝導低温工学センター, 教授 (70322831)

Co-Investigator(Kenkyū-buntansha) 山口 博史  大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 研究員 (40717914)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywords超伝導磁石 / 精密磁場調整 / 磁場測定 / 磁性流体 / 磁性パテ / 精密磁場測定 / 核磁気共鳴 / 磁場調整 / NMR
Outline of Final Research Achievements

In order to improve the homogeneity of the static magnetic field in the internal space of a superconducting magnet for whole-body MRI, a magnetic field adjustment operation called shimming is necessary. It was found that the required homogeneity could not be achieved in the spatial magnetic field homogeneity adjustment test using small iron pieces (minimum unit 0.47 g), which is a conventional method. Therefore, I developed a new method for adjusting the spatial magnetic field using ferrofluid and magnetic putty, which have smaller magnetization than iron of the same volume. In this study, a spatial homogeneity of 0.17 ppm (peak to peak) was achieved in the muon stop region (Fig. 1).

Academic Significance and Societal Importance of the Research Achievements

最近の素粒子物理学分野においては、ミュオン及び陽電子の磁気能率測定や、ミュオニウムにおける超微細構造測定など、物理量を精密に測定する実験が計画・遂行されており、それらの実験には数十cm角程度の大きな空間で非常に均一度の高い磁場が要求されている。本研究成果において、大空間において0.2ppm p-p以下の磁場均一度を達成するための有効な方式を示し、その達成に必要不可欠な測定装置に関する核心的な技術を開発した。この成果は、精密な物理量の決定に対する一助となり、ひいては物理学の発展に貢献するものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (19 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Argonne National Laboratory/The University of Massachusetts Amherst(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Argonne National Laboratory/The University of Massachusetts Amherst(米国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Development of a CW-NMR Probe for Precise Measurement of Absolute Magnetic Field2019

    • Author(s)
      Yamaguchi Hiroshi、Sasaki Ken-ichi、Tanaka Toya、Abe Mitsushi、Flay David、Kawall David、Mibe Tsutomu、Seo Shun、Shimomura Koichiro、Ueno Yasuhiro、Winter Peter
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 29 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2019.2895360

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 飽和磁化の小さい物質を用いたミューオン捕捉用超伝導磁石の精密磁場調整2021

    • Author(s)
      杉田 萌
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高磁場下におけるMuSEUM 実験に用いる磁場空間分布測定器の開発2021

    • Author(s)
      清水 光太郎
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 全身MRI用磁石技術を応用したビーム捕捉用超伝導磁石の精密磁場調整2020

    • Author(s)
      杉田 萌
    • Organizer
      第17回日本加速器学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Study on Shimming System of Superconducting Magnets for J-PARC g-2/EDM and MuSEUM experiments2020

    • Author(s)
      佐々木憲一
    • Organizer
      10th ACASC / 2nd Asian-ICMC/CSSJ Joint Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A shimming technique to obtain high homogeneous magnetic field2020

    • Author(s)
      阿部充志
    • Organizer
      10th ACASC / 2nd Asian-ICMC/CSSJ Joint Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Precise Operation of Superconducting Magnet for Beam Capture Applying Whole-body MRI Magnet Technology2020

    • Author(s)
      杉田萌
    • Organizer
      10th ACASC / 2nd Asian-ICMC/CSSJ Joint Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of fine shimming technique with magnetorheological fluid2019

    • Author(s)
      佐々木憲一
    • Organizer
      MT-26
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] J‐PARCミュオニウム超微細構造精密測定の_磁場測定準備状況2019

    • Author(s)
      山口博史
    • Organizer
      日本物理学会2019秋季大会(物性)
    • Related Report
      2019 Annual Research Report
  • [Presentation] MuSEUM及びJ-PARC muon g-2/EMD実験に用いる較正用磁場測定器の開発状況2019

    • Author(s)
      山口博史
    • Organizer
      日本物理学会2019秋季大会(素核宇)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高磁場におけるミュオニウム超微細構造測定に向けた磁場測定器開発2019

    • Author(s)
      田中陶冶
    • Organizer
      日本物理学会2019秋季大会(素核宇)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 磁場強度に対する温度の影響に関する検討と超均一磁場調整手法の開発2019

    • Author(s)
      杉田萌
    • Organizer
      第16回 日本加速器学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] CONSIDERATION OF ACTUAL OPERATION OF SUPERCONDUCTING MAGNET FOR BEAM TRAP FOR ULTRA-PRECISE PARTICLE APPLIED WHOLE-BODY MRI MAGNET TECHNOLOGY2019

    • Author(s)
      杉田萌
    • Organizer
      4th International Symposium of Quantum Beam Science at Ibaraki University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ミューオニウム超微細構造精密測定実験(MuSEUM)及びミューオン異常磁気能率・電気双極子能率精密測定実験(J-PARC muon g-2/EDM)の磁場測定装置開発2019

    • Author(s)
      山口博史
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ミューオニウム超微細構造精密測定実験及びミューオン異常磁気能率・電気双極子能率精密測定実験の磁場測定装置開発2018

    • Author(s)
      山口博史
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of a CW-NMR Probe for Precise Measurement of Absolute Magnetic Field2018

    • Author(s)
      Hiroshi Yamaguchi
    • Organizer
      Applied Superconductivity Conference, 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Funded Workshop] Absolute magnetic field measurement Workshop ~ US-JP Collaboration Meeting on B Field Cross Calibration2019

    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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