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Study on three-dimensional flux dynamics in bulk superconductor for improving its magnetization performance

Research Project

Project/Area Number 17360136
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionThe University of Tokyo

Principal Investigator

OHSAKI Hiroyuki  The University of Tokyo, Graduate School of Frontier Sciences, Professor (10203754)

Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥12,200,000 (Direct Cost: ¥12,200,000)
Fiscal Year 2006: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2005: ¥7,400,000 (Direct Cost: ¥7,400,000)
Keywordssuperconductivity / bulk / flux motion / magnetization / numerical analysis / coupled analysis / 超伝導 / 錬成解析
Research Abstract

RE-Ba-Cu-O bulk superconductor has the good flux-pinning property and is expected to be applied as a high flux source. For such an application the pulsed field magnetization is an important technique and its performance improvement is required. This study aims at examining flux dynamics during the pulsed field magnetization process, clarifying flux motion and induced current distribution when a pulse magnetic field is applied to bulk superconductor with spatially inhomogeneous superconducting properties, and considering performance improvement of pulsed field magnetization. Both experiments and numerical analysis were carried out.
In the experiments search coils and a hall probe were used to measure the variation of flux density distribution during the pulsed field magnetization and the resultant trapped flux density distribution. The results have clarified the relation between the flux density distribution and the applied magnetic fields. For numerical analysis, a analysis tool for axi … More symmetric three-dimensional coupled problems of electromagnetic and temperature fields has been developed with the voltage-current characteristics of bulk superconductor and the dependence of its critical current density on magnetic flux density and temperature taken into account under the cooling conditions of immersion cooling by liquid nitrogen and conduction cooling by a cryocooler. In addition full three-dimensional analysis was also carried out and discussed for several cases. With these analysis tools and models the numerical analysis of pulsed field magnetization process of bulk superconductor were performed under the various conditions. The analysis results qualitatively agreed with experimental results, and indicate that the analysis tools and models can be used for the detailed analysis of electromagnetic phenomena and temperature distribution in the superconductor.
From these experimental and analysis results the flux motion and dynamics in bulk superconductor during pulsed field magnetization has been discussed and clarified. Less

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (9 results)

All 2007 2006 2005

All Journal Article (9 results)

  • [Journal Article] Multipoint Measurements of Transient Flux Motion on Bulk Supercondutor During Pilsed Field Magnetization2007

    • Author(s)
      R.Shiraishi
    • Journal Title

      IEEE Transactions on Applied Superconductivity 17・2

      Pages: 3664-3667

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multipoint Measurements of Transient Flux Motion on Bulk Superconductor During Pulsed Field Magnetization2007

    • Author(s)
      R. Shiraishi, H. Ohsaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity Vol.17, No.2

      Pages: 3664-3667

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Flux Dynamics in Inhomogeneous Bulk Superconductor Pulsed Field Magnetization2006

    • Author(s)
      R.Shiraishi
    • Journal Title

      IEEE Transactions on Applied Superconductivity 16・2

      Pages: 1794-1797

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Flux Dynamics in Inhomogeneous Bulk Superconductor During Pulsed Field Magnetization2006

    • Author(s)
      R. Shiraishi, H. Ohsaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity Vol.16, No.2

      Pages: 1794-1797

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Flux Dynamics in Inhomogeneous Bulk Superconductor During Pulsed Field Magnetization2006

    • Author(s)
      Ryosuke Shiraishi, Hiroyuki Ohsaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity 16・2

      Pages: 1794-1797

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Influence of local superconducting properties on pulsed field magnetization of YBCO bulk superconductor2005

    • Author(s)
      K.Fujiyama
    • Journal Title

      Physica C 426-431・1

      Pages: 681-687

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Macroscopic magnetic flux motion in Y-Ba-Cu-O bulk superconductor during pulsed field magnetization2005

    • Author(s)
      R.Shiraishi
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15・2

      Pages: 3153-3156

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Influence of local superconducting properties on pulsed field magnetization of YBCO bulk superconductor2005

    • Author(s)
      K. Fujiyama, R. Shiraishi, H. Ohsaki
    • Journal Title

      Physica C(Part 1) Vol.426-431

      Pages: 681-687

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Macroscopic magnetic flux motion in Y-Ba-Cu-O bulk superconductor during pulsed field magnetization2005

    • Author(s)
      R. Shiraishi, K. Fujiyama, H. Ohsaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity(Issue2)(Part3) Vol.15

      Pages: 3153-3156

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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