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10 V Programmable Josephson Voltage Standard and its Application in Direct Comparison with the Conventional Josephson Voltage Standard



Yi-hua D. Tang, James Wachter, Alain Rufenacht, Gerald J. FitzPatrick, Samuel P. Benz


This paper briefly describes the working principle of the 10 V programmable Josephson voltage standard (PJVS) that was developed at the National Institute of Standards and Technology (NIST) and how to use it in a direct comparison with a conventional Josephson voltage standard (JVS). Manual and automatic comparison methods were developed to verify the agreement between the two types of Josephson standards. A 10 V PJVS provided by the National Aeronautics and Space Administration (NASA) was used as a transfer standard in the 2014 JVS Interlaboratory Comparison (ILC) that is organized by the National Conference of Standard Laboratories International (NCSLI). The results of automatic direct comparisons between a NASA PJVS and three conventional JVS (CJVS) are reported. Allan variance is applied to analyze the large number of data for Type A uncertainty.
IEEE Transactions on Instrumentation and Measurement


Digital-analog conversion, Josephson arrays, Quantization, Signal synthesis, Standards, Superconducting integrated circuits, Voltage measurement
Created August 17, 2015, Updated November 10, 2018