Direct DC Voltages Comparison between two Programmable Josephson Voltage Standards at SCL
S. Yang, Stefan Cular, Alain Rufenacht, Charles J. Burroughs, Paul D. Dresselhaus, Samuel P. Benz, M. N. Ng
Standards and Calibration Laboratory (SCL) setup in 2018 a liquid helium based programmable Josephson voltage standard (PJVS) developed by the National Institute of Standards and Technology (NIST). The system was validated by direct comparison with a NIST transportable PJVS system at 1.018 V, 4 V, 6 V, 8 V and 10 V. The difference between the systems was within 0.5 nV, with an expanded uncertainty of less than 2.2 nV (k = 2). In this paper, the setup and the results of the direct comparison method are presented.
2020 Conference on Precision Electromagnetic Measurements (CPEM)