Study on the AC Magnetization of LHC Type of Rutherford Cables

A.P. Verweij, L. Eriksson, H.H.J. ten Kate

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    In accelerator magnets, and especially at low excitation values, the field errors are mainly determined by the filament hysteresis. To obtain an understanding of this hysteresis, measurements are normally performed on strands under the assumption that the magnetization of the cable is equal to the magnetization of the strands. In this paper a new test arrangement is described to measure the AC and DC magnetization of flat cables up to lengths of about 13 cm. Magnetization measurements on various NbTi keystoned Rutherford type of cables are presented. In order to investigate the influence of the geometry of the cable in terms of the strand and cable pitches, some strands are also separately tested in both their original (straight) and “cable” shapes. The field is applied parallel to the wide side of the cable. One can calculate for this case that the magnetization is mainly determined by the hysteresis of the filaments and the inter-filament coupling. For strands with a copper matrix the inter-strand coupling in the parallel field is negligible, even for relatively low inter-strand contact resistances. An experimental study of the inter-strand magnetization is only relevant if the transverse pressure on the cable under test conditions is about the same as the pressure in the coils in which the cable is used.
    Original languageEnglish
    Title of host publicationSupercollider 5
    Subtitle of host publication"Proceedings of the Fifth International Industrial Symposium on the Super ColI ider. held May 6-8, 1993, in San Francisco, California
    Place of PublicationNew York
    PublisherSpringer
    Pages587-590
    ISBN (Electronic)978-1-4615-2439-7
    ISBN (Print)978-1-4613-6036-0
    DOIs
    Publication statusPublished - 8 May 1993
    EventFifth International Industrial Symposium on The Super Collider 1993 - San Fransisco, United States
    Duration: 6 May 19938 May 1993
    Conference number: 5

    Conference

    ConferenceFifth International Industrial Symposium on The Super Collider 1993
    CountryUnited States
    CitySan Fransisco
    Period6/05/938/05/93

    Keywords

    • METIS-134428

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