Normal-zone propagation properties in Bi-2223/Ag superconducting multifilament tapes

S. B. Kim, Atsushi Ishiyama, H. Okada, S. Nomura

    Research output: Contribution to journalArticle

    39 Citations (Scopus)

    Abstract

    It is expected that the normal-zone propagation of a high-temperature superconductor (HTS) is slower than that of a low-temperature superconductor (LTS) because of its large heat capacity. If the normal-zone propagates too slowly, hot spots will develop, possibly resulting in permanent conductor damage. Accordingly, there is a need to measure propagation quantitatively for designing HTS magnets. This paper describes the electromagnetic and thermal behavior of Bi-2223/Ag superconducting multifilament tapes during normal transition by conduction cooling. Some experiments were carried out under the conditions of operating temperature at 10-40 K and transport current as parameters in a zero magnetic field. Sample tapes were transited normally with a heater to initiate a quench. The voltage and temperature properties corresponding to normal transition were measured by voltage taps and thermocouples attached to the sample tapes. We also calculated longitudinal and transverse-direction normal-zone propagation velocities from the voltage and temperature traces. In the case of conduction cooling, we investigated the cooling effect due to the length of the sample tape because its cooling condition is different from the case of using a coolant - for example, liquid helium.

    Original languageEnglish
    Pages (from-to)823-831
    Number of pages9
    JournalCryogenics
    Volume38
    Issue number8
    Publication statusPublished - 1998 Aug

    Fingerprint

    Superconducting tapes
    tapes
    Tapes
    Cooling
    cooling
    propagation
    High temperature superconductors
    high temperature superconductors
    Electric potential
    electric potential
    conduction
    Temperature
    Helium
    propagation velocity
    taps
    coolants
    thermocouples
    Thermocouples
    operating temperature
    heaters

    Keywords

    • Bi-2223/Ag superconducting tape
    • Conduction cooling
    • HTS and LTS
    • Normal-zone propagation velocity
    • Quench

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Normal-zone propagation properties in Bi-2223/Ag superconducting multifilament tapes. / Kim, S. B.; Ishiyama, Atsushi; Okada, H.; Nomura, S.

    In: Cryogenics, Vol. 38, No. 8, 08.1998, p. 823-831.

    Research output: Contribution to journalArticle

    Kim, S. B. ; Ishiyama, Atsushi ; Okada, H. ; Nomura, S. / Normal-zone propagation properties in Bi-2223/Ag superconducting multifilament tapes. In: Cryogenics. 1998 ; Vol. 38, No. 8. pp. 823-831.
    @article{6ddd85f8e7214a27a2a1fa5212f21de2,
    title = "Normal-zone propagation properties in Bi-2223/Ag superconducting multifilament tapes",
    abstract = "It is expected that the normal-zone propagation of a high-temperature superconductor (HTS) is slower than that of a low-temperature superconductor (LTS) because of its large heat capacity. If the normal-zone propagates too slowly, hot spots will develop, possibly resulting in permanent conductor damage. Accordingly, there is a need to measure propagation quantitatively for designing HTS magnets. This paper describes the electromagnetic and thermal behavior of Bi-2223/Ag superconducting multifilament tapes during normal transition by conduction cooling. Some experiments were carried out under the conditions of operating temperature at 10-40 K and transport current as parameters in a zero magnetic field. Sample tapes were transited normally with a heater to initiate a quench. The voltage and temperature properties corresponding to normal transition were measured by voltage taps and thermocouples attached to the sample tapes. We also calculated longitudinal and transverse-direction normal-zone propagation velocities from the voltage and temperature traces. In the case of conduction cooling, we investigated the cooling effect due to the length of the sample tape because its cooling condition is different from the case of using a coolant - for example, liquid helium.",
    keywords = "Bi-2223/Ag superconducting tape, Conduction cooling, HTS and LTS, Normal-zone propagation velocity, Quench",
    author = "Kim, {S. B.} and Atsushi Ishiyama and H. Okada and S. Nomura",
    year = "1998",
    month = "8",
    language = "English",
    volume = "38",
    pages = "823--831",
    journal = "Cryogenics",
    issn = "0011-2275",
    publisher = "Elsevier Limited",
    number = "8",

    }

    TY - JOUR

    T1 - Normal-zone propagation properties in Bi-2223/Ag superconducting multifilament tapes

    AU - Kim, S. B.

    AU - Ishiyama, Atsushi

    AU - Okada, H.

    AU - Nomura, S.

    PY - 1998/8

    Y1 - 1998/8

    N2 - It is expected that the normal-zone propagation of a high-temperature superconductor (HTS) is slower than that of a low-temperature superconductor (LTS) because of its large heat capacity. If the normal-zone propagates too slowly, hot spots will develop, possibly resulting in permanent conductor damage. Accordingly, there is a need to measure propagation quantitatively for designing HTS magnets. This paper describes the electromagnetic and thermal behavior of Bi-2223/Ag superconducting multifilament tapes during normal transition by conduction cooling. Some experiments were carried out under the conditions of operating temperature at 10-40 K and transport current as parameters in a zero magnetic field. Sample tapes were transited normally with a heater to initiate a quench. The voltage and temperature properties corresponding to normal transition were measured by voltage taps and thermocouples attached to the sample tapes. We also calculated longitudinal and transverse-direction normal-zone propagation velocities from the voltage and temperature traces. In the case of conduction cooling, we investigated the cooling effect due to the length of the sample tape because its cooling condition is different from the case of using a coolant - for example, liquid helium.

    AB - It is expected that the normal-zone propagation of a high-temperature superconductor (HTS) is slower than that of a low-temperature superconductor (LTS) because of its large heat capacity. If the normal-zone propagates too slowly, hot spots will develop, possibly resulting in permanent conductor damage. Accordingly, there is a need to measure propagation quantitatively for designing HTS magnets. This paper describes the electromagnetic and thermal behavior of Bi-2223/Ag superconducting multifilament tapes during normal transition by conduction cooling. Some experiments were carried out under the conditions of operating temperature at 10-40 K and transport current as parameters in a zero magnetic field. Sample tapes were transited normally with a heater to initiate a quench. The voltage and temperature properties corresponding to normal transition were measured by voltage taps and thermocouples attached to the sample tapes. We also calculated longitudinal and transverse-direction normal-zone propagation velocities from the voltage and temperature traces. In the case of conduction cooling, we investigated the cooling effect due to the length of the sample tape because its cooling condition is different from the case of using a coolant - for example, liquid helium.

    KW - Bi-2223/Ag superconducting tape

    KW - Conduction cooling

    KW - HTS and LTS

    KW - Normal-zone propagation velocity

    KW - Quench

    UR - http://www.scopus.com/inward/record.url?scp=0032132306&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0032132306&partnerID=8YFLogxK

    M3 - Article

    AN - SCOPUS:0032132306

    VL - 38

    SP - 823

    EP - 831

    JO - Cryogenics

    JF - Cryogenics

    SN - 0011-2275

    IS - 8

    ER -