The proof mass for the NOVA satellite must be designed to minimize disturbance forces from the field of a nearby damping magnet. To insure this, proof mass susceptibility must be smaler or equal than 4 that of Ag, and ferromagnetic impurities must be minimized. The magnetic design and testing to meet these specifications may be of interest to others requiring high purity nonferromagnetic materials and the elimination of ferromagnetic contaminants. Low susceptiblity was achieved by using laminations of Al and Ag proportioned to balance para- and diamagnetic susceptiblities. Susceptibility as low as 3 % of Ag was achieved. However, residual magnetization of 2 x 10-4 pole-cm was detected after exposure to 18 kG, indicating ferromagnetic contamination. Attempts to identify the contaminant by atomic absorption and mass spectroscopy were unsuccessful.


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    Title :

    A low susceptibility proof mass for the NOVA satellite


    Additional title:

    Eine unempfindliche Probemasse fuer den NOVA-Satelliten


    Contributors:

    Published in:

    Publication date :

    1981


    Size :

    3 Seiten, 6 Bilder, 2 Tabellen, 2 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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