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Fundamental study for the establishment of the design principle of conduction-cooled oxide superconducting magnets

Research Project

Project/Area Number 16360139
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKYUSHU UNIVERCITY

Principal Investigator

IWAKUMA Masataka  Kyushu University, Research Institute of Superconductor Science and Systems, Associate professor, 超伝導システム科学研究センター, 助教授 (30176531)

Co-Investigator(Kenkyū-buntansha) KAJIKAWA Kazuhiro  Kyushu University, Research Institute of Superconductor Science and Systems, Associate professor, 超伝導システム科学研究センター, 助教授 (10294894)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥14,700,000 (Direct Cost: ¥14,700,000)
Fiscal Year 2006: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2005: ¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 2004: ¥7,100,000 (Direct Cost: ¥7,100,000)
Keywordssuperconducting magnet / oxide superconductor / conduction-cooling / Bi2223 / thermal runway / cryocooler / quench / ac loss / 酸化物超伝導体
Research Abstract

Paying attention to the conduction cooling to cool oxide superconducting magnets in place of the conventional bath-cooling with liquid helium, we studied the stability and the protection method of oxide superconducting magnets. In order to get rid of the design principle for the conventional low-Tc superconducting magnets, which consists of the stability theory based on the cooling characteristics of liquid helium and the protective condition of superconducting magnets, e.g. the recovery-condition of stored energy, we aimed at constructing the new design principle of conduction-cooled oxide superconducting magnets operated at over 20K, including the fabrication method of oxide superconductors with a large current capacity. First we observed the electromagnetic and thermal properties of a 1T cryocooler-cooled oxide superconducting coil. It was shown that the thermal runaway of the coil depended on the local thermal balance between the heat generation due to the flux-flow loss and the cooling due to thermal conduction inside the winding, not on the balance between the total heat generation of the coil and the cooling capacity of the cryocooler. Next we made numerical expressions of the temperature dependencies of the heat generation of oxide superconducting wires due to ac loss and flux-flow loss with large anisotropy and the thermal conductivity inside the winding. We also developed a numerical simulation program of the behavior of the conduction-cooled coil and made it possible to discuss the dependences of the thermal runaway of the coil on temperature and transport current. As a result, we showed the design principle of conduction-cooled oxide superconducting magnets clarifying the difference between the conventional bath-cooled superconducting magnets and conduction-cooled oxide superconducting magnets.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (23 results)

All 2006 2005 2004 Other

All Journal Article (23 results)

  • [Journal Article] Numerical Simulation of Thermal Properties of a Cryocooler-Cooled Bi2223 Superconducting Pulsed Coil in Ac operation2006

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol. 16, No.2

      Pages: 1746-1752

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Thermal Properties of Bi2223 Conduction-Cooled Pulse Coil for SMES2006

    • Author(s)
      M.Iwakuma, et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol. 16, No.2

      Pages: 1757-1760

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Thermal Properties of a Cryocooler-Cooled Bi2223 Superconducting Pulsed Coil in Ac operation2006

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.16, No.2

      Pages: 1746-1752

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Thermal Properties of Bi2223 Conduction-Cooled Pulse Coil for SMES2006

    • Author(s)
      M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.16, No.2

      Pages: 1757-1760

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Thermal Properties of a Cryocooler-Cooled Bi2223 Superconducting Pulsed Coil in Ac operation2006

    • Author(s)
      H.Miyazaki, M.Iwakuma et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol.16,No.2

      Pages: 1746-1752

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Numerical Simulation of Thermal Properties of Bi2223 Conduction-Cooled Pulse Coil for SMES2006

    • Author(s)
      M.Iwakuma at al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol.16,No.2

      Pages: 1757-1760

    • Related Report
      2006 Annual Research Report
  • [Journal Article] AC loss properties of YBCO superconducting tapes exposed to external AC magnetic field2005

    • Author(s)
      M.Iwakuma, et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol.15, No.2

      Pages: 1562-1565

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Thermal runaway of a 1 T cryocooler-cooled oxide Superconducting pulsed coil in Ac operation2005

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol.15, No.2

      Pages: 1663-1666

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] AC loss properties of YBCO superconducting tapes exposed to external AC magnetic field2005

    • Author(s)
      M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.15, No.2

      Pages: 1562-1565

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Thermal runaway of a 1 T cryocooler-cooled oxide Superconducting pulsed coil in Ac operation2005

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.15, No.2

      Pages: 1663-1666

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] AC loss properties of YBCO superconducting tapes exposed to external AC magnetic field2005

    • Author(s)
      M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.15,No.2

      Pages: 1562-1565

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Thermal runaway of a 1 T cryocooler-cooled oxide Superconducting pulsed coil in Ac operation2005

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.15,No.2

      Pages: 1663-1666

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Numerical calculation of Ac losses in stacked Bi-2223 tapes exposed to oblique magnetic field2005

    • Author(s)
      T.Hayashi, K.Kajikawa, M.Iwakuma, K.Funaki
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.15,No.2

      Pages: 2863-2866

    • NAID

      10013790804

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 伝導冷却高温超電導コイルの交流電流通電時安定性解析2005

    • Author(s)
      田崎賢司, 岩熊成卓, 他
    • Journal Title

      低温工学 Vol.40,No.9

      Pages: 360-367

    • NAID

      10016125757

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 伝導冷却高温超電導コイルの熱的安定性評価 -熱暴走試験2005

    • Author(s)
      田崎賢司, 岩熊成卓, 他
    • Journal Title

      低温工学 Vol.40,No.10

      Pages: 404-411

    • NAID

      10016379548

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 伝導冷却高温超電導コイルの熱的安定性評価 -熱的安定性評価2005

    • Author(s)
      田崎賢司, 岩熊成卓, 他
    • Journal Title

      低温工学 Vol.40,No.10

      Pages: 412-419

    • Related Report
      2005 Annual Research Report
  • [Journal Article] AC loss and thermal runaway of 1 T cryocooler-cooled oxide superconducting pulsed coil2004

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans. Appl. Supercond. Vol.14・No.2

      Pages: 774-777

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] AC loss properties of YBCO superconducting tapes fabricated by IBA-PLD technique2004

    • Author(s)
      M.Iwakuma et al.
    • Journal Title

      Physica C Vols.412-414

      Pages: 983-991

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] AC loss and thermal runaway of 1 T cryocooler-cooled oxide superconducting pulsed coil2004

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.14・No.2

      Pages: 774-777

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] AC operating test results for a conduction-cooled HTS coil2004

    • Author(s)
      K.Tasaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. Vol.14・No.2

      Pages: 731-734

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Ac Loss Properties of YBCO Superconducting Tapes Exposed to External Ac Magnetic Field

    • Author(s)
      M.Iwakuma et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. (to be published)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Thermal Runaway of a 1 T Cryocooler-Cooled Oxide Superconducting Pulsed Coil in Ac Operation

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      IEEE Trans.Appl.Supercond. (to be published)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Study on the stability of a 1T cryocooler-cooled oxide superconducting pulsed coil

    • Author(s)
      H.Miyazaki, M.Iwakuma, et al.
    • Journal Title

      Physica C (to be published)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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