Spatial and temporal behavior of magnetic field distribution due to shielding current in HTS coil for cyclotron application

Hiroshi Ueda, Mitsuhiro Fukuda, Kichiji Hatanaka, Tao Wang, Atsushi Ishiyama, So Noguchi

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    We intend to develop and obtain a compact, high-efficiency and high-performance cyclotron using the high-temperature superconducting (HTS) magnet technology. In cyclotron applications, a high-accuracy magnetic field distribution with an isochronous field and an azimuthally varying field is spatially and temporally required for an HTS coil. In coils wound with HTS tapes, large shielding currents are induced in the HTS tape by the radial component of the magnetic field. The magnetic field generated by the shielding current affects the magnetic field distribution in the cyclotron application in the following issues: (1) field reduction by the shielding current, (2) accuracy of the field distribution, (3) temporal stability of the time-dependent shielding currents, and (4) field repeatability after charge and discharge repetitions. These effects are very critical in cyclotron applications. We developed a novel numerical simulation based on the finite element method, boundary integral equation, and fast multipole method. We investigated the spatial and temporal behavior of the magnetic field attributed to the shielding current in the HTS coil for the HTS cyclotron application.

    Original languageEnglish
    Article number4100805
    JournalIEEE Transactions on Applied Superconductivity
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    Cyclotrons
    Shielding
    cyclotrons
    shielding
    coils
    Magnetic fields
    magnetic fields
    Superconducting tapes
    Temperature
    tapes
    Boundary integral equations
    Superconducting magnets
    Induced currents
    superconducting magnets
    multipoles
    Superconducting coils
    integral equations
    repetition
    finite element method
    Finite element method

    Keywords

    • Cyclotron
    • high-accuracy magnetic field
    • shielding current
    • temporal stability

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Spatial and temporal behavior of magnetic field distribution due to shielding current in HTS coil for cyclotron application. / Ueda, Hiroshi; Fukuda, Mitsuhiro; Hatanaka, Kichiji; Wang, Tao; Ishiyama, Atsushi; Noguchi, So.

    In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 4100805, 2013.

    Research output: Contribution to journalArticle

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    AU - Fukuda, Mitsuhiro

    AU - Hatanaka, Kichiji

    AU - Wang, Tao

    AU - Ishiyama, Atsushi

    AU - Noguchi, So

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