Alternating magnetic field losses in ATLAS type aluminum stabilized NbTi superconductors

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    Abstract

    During ramping up- and down of the current in large-scale magnets the ramp losses are an important factor affecting the thermal and electro-magnetic stability of the system. The calculation of the losses is not straightforward due to the large dimensions of the conductor (∼600 mm2) implying that diffusion effects have to be taken into account. The AC-losses of the Al stabilized NbTi cable conductors used in the ATLAS magnet system were measured in 0.5 m long samples, using an inductive method with pick-up coils as well as the calorimetric method. External varying magnetic fields up to 2 tesla amplitude were applied parallel and perpendicular to the conductor wide surface. The results are compared to theory. It is found that hysteresis loss, eddy current loss in the Aluminum cladding and cable-to-cladding coupling loss contribute most to the AC loss.
    Original languageEnglish
    Title of host publicationProceedings of the International Cryogenic Materials Conference, ICMC, Madison, Wisconsin, USA, 16-20 July, 2001
    EditorsU. (Balu) Balachandran, Donald Gubser, K. Ted Hartwig, Melinda Adams
    PublisherAmerican Institute of Physics
    Pages906-913
    Number of pages8
    ISBN (Print)0-7354-0060-1
    DOIs
    Publication statusPublished - 2002
    Event2001 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 2001 - Madison, United States
    Duration: 16 Jul 200120 Jul 2001

    Publication series

    NameAdvances in cryogenic engineering
    PublisherAIP
    Volume48
    ISSN (Print)0065-2482
    NameAIP Conference Proceedings
    PublisherAIP
    Volume614

    Conference

    Conference2001 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 2001
    Abbreviated titleCEC/ICMC
    CountryUnited States
    CityMadison
    Period16/07/0120/07/01

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