Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets

B. H. Yoo, J. C. Kim, Y. G. Kim, D. Y. Hwang, J. H. Lee, H. G. Lee

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was <1.5 × 10-14 Ω. Therefore, the proposed joint technique can be employed for developing multifilament MgB2 MRI magnets operating in the persistent-current mode.

    Original languageEnglish
    Article number094701
    JournalReview of Scientific Instruments
    Volume89
    Issue number9
    DOIs
    Publication statusPublished - 2018 Sept 1

    Bibliographical note

    Publisher Copyright:
    © 2018 Author(s).

    ASJC Scopus subject areas

    • Instrumentation

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