Thermal conductivity of mica/glass insulation for impregnated Nb3Sn windings in accelerator magnets

Andries den Ouden, Herman H.J. ten Kate

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    Abstract

    The thermal conductivity of a combination of glass fibre tape and mica/glass sheetas insulation for superconducting Nb3Sn cables for a fully impregnated accelerator dipole magnet has been investigated. At 4.3 K a value for the thermal conductivity coefficient of 45 mW/m/K has been found, which is a considerable improvement compared to values of 5–15 mW/m/K if only mica/glass sheet is applied. An improved resin penetration to both sides of the mica/glass sheet not only increases the thermal conduction and therefore the stability margin of the superconductor, but it also enhances the shear strength of the insulation layer.
    Original languageEnglish
    Pages (from-to)385-388
    Number of pages4
    JournalCryogenics
    Volume34
    Issue numberSuppl. 1
    DOIs
    Publication statusPublished - 1994
    Event15th International Cryogenic Engineering Conference, ICEC 1994 - Genoa, Italy
    Duration: 7 Jun 199410 Jun 1994
    Conference number: 15

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