Ammeter for the non-destructive measurement of high currents in superconductors

D. G. Blair, Louisiana State University
W. O. Hamilton, Louisiana State University
B. C. Hymel, Louisiana State University
B. B. Stewart, Louisiana State University


The construction and operation of an ammeter for the measurement of supercurrents is described. The ammeter consists of an LC circuit whose inductance is modulated by the proximity of a niobium diaphragm which is deflected away from a current carrying conductor. Resulting changes in its resonant frequency are related to the magnitude of the current in the conductor. Calibration and alternate methods of operation are described. © 1975.