Title :
Progress in the establishment of a Josephson voltage standard at the Spanish TPA
Author :
Camon, Agustin ; Lopez, Miguel ; Lera, Francisco ; Pinto, Pedro ; Lorenzo, Luis ; Lamana, Jose Maria ; Rillo, Conrado ; Navarro, Rafael
Author_Institution :
Inst. de Ciencia de Mater. de Aragon, Zaragoza Univ., Spain
fDate :
4/1/1993 12:00:00 AM
Abstract :
A 1-V Josephson voltage standard which easily permits exchange of Josephson junction arrays (JJAs) was constructed and installed at the Spanish TPA. Two different types of JJAs, Nb/NbOx/PbInAu from NIST and Nb/Al2O3/Nb from PTB, are used to determine the evolution of Zener references, both being compatible with the system. No discrepancies within the uncertainty (18 parts in 109) are observed when, for a given reference, the arrays are interchanged. Moreover, preliminary calibration results obtained at two other laboratories show good agreement with the data
Keywords :
Josephson effect; calibration; measurement standards; superconducting junction devices; voltage measurement; 1 V; Josephson voltage standard; NIST; Nb-Al2O3-Nb; Nb-NbOx-PbInAu; PTB; Spanish TPA; Zener references; arrays; calibration; measurement standard; Diodes; Frequency measurement; Gunn devices; Josephson junctions; Laboratories; Microwave generation; NIST; Niobium; Uncertainty; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
