Title :
The AC Josephson Effect Monitoring of the Unit of EMF in Canada
Author :
Wood, Gordon H. ; Dunn, Andrew F. ; Nadon, Lawrence A.
Abstract :
The experimental program outlined is directed toward the utilization of the ac Josephson effect to maintain surveillance of the unit of EMF in Canada. Preliminary results indicate a weighted mean value of 2e/h = 483 593.0 ± 0.2 (0.4 ppm) GHz/VNRc(73) which is, at present, not precise enough to detect the small drifts normally encountered in the mean value of the standard cell group upon which VNRC is based.
Keywords :
Councils; Current-voltage characteristics; Frequency; Josephson effect; Josephson junctions; Monitoring; Substrates; Superconducting transition temperature; Surveillance; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1974.4314291
