Instrument measures thermal conductance of pressed contacts in liquid helium. Makes measurements automatically as function of force on pairs of brass samples having various surface finishes. Developed as part of effort to determine heat-transfer characteristics of bolted joints on cryogenically cooled focal planes in infrared equipment. Cylindrical chamber hangs from cover plate in bath of liquid helium. Inside chamber rocker arm applies controlled force to samples. Upper sample made slightly wider than lower one so two samples remain in complete contact even under slight lateral misalignment.


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    Title :

    Measuring Contact Thermal Conductances at Low Temperatures


    Contributors:

    Published in:

    Publication date :

    1987-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English





    Thermal Conductances Of Metal Contacts

    Salerno, L. J. / Kittel, P. / Scherkenbach, F. E. et al. | NTRS | 1988


    Thermal Conductances of Pressed Copper Contacts

    Salerno, L. / Kittel, P. / Spivak, A. | NTRS | 1986


    Surface hardness distribution effects upon contact, gap and joint conductances

    YOVANOVICH, M. / HEGAZY, A. / DEVAAL, J. | AIAA | 1982