A Two-Way Josephson Voltage Standard Comparison between NIST and NRC

Published

April 1, 2008

Author(s)

Yi-hua Tang, Barry Wood, Clark Hamilton

Abstract

A two-way Josephson voltage standard (JVS) direct comparison between the National Institute of Standards and Technology (NIST) and the National Research Council (NRC) has been conducted. The process consists of two comparisons, which means that the NIST JVS provided a voltage at 10 V and was measured against the NRC JVS with NRC's measuring system (hardware and software). The comparison was repeated by using the NIST JVS measuring system to measure a voltage at 10 V provided by the NRC JVS. The results of the two comparisons are in agreement to within 0.7 nV and their mean indicates that the difference between the two JVSs at 10 V is -0.28 nV with a pooled combined uncertainty of 2.07 nV (k = 2) or relative uncertainty of 2.1 parts in 10^10.

Citation

IEEE Transactions on Instrumentation and Measurement

Pub Type

Journals

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Keywords

Compact Josephson voltage standard, direct comparison, Josephson voltage standard, uncertainty

Citation

Tang, Y. , Wood, B. and Hamilton, C. (2008), A Two-Way Josephson Voltage Standard Comparison between NIST and NRC, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=33038 (Accessed October 27, 2025)