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.
A low susceptibility proof mass for the NOVA satellite
Eine unempfindliche Probemasse fuer den NOVA-Satelliten
IEEE Transactions on Magnetics ; 17 , 6 ; 3382-3384
1981
3 Seiten, 6 Bilder, 2 Tabellen, 2 Quellen
Article (Journal)
English
Radiation-proof satellite technology
Elsevier | 1984
|Online Contents | 2004
|Elsevier | 2003
|Online Contents | 1995