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Development of a 60 Hz Power Standard using SNS Programmable Josephson Voltage Standards



Charles J. Burroughs, Samuel Benz, Paul Dresselhaus, Yonuk Chong, Bryan C. Waltrip, Thomas L. Nelson, J. Williams, D. Henderson, P. Patel, Luis Palafox, Ralf Behr


We are implementing a new standard for 60 Hz power based on precision sinusoidal reference voltages from two independent Programmable Josephson Voltage Standards (PJVS) (one for voltage and one for current). The NIST PJVS systems use series arrays of Josephson junctions to produce accurate, quantum-based dc voltages. Using step-wise approximation synthesis, the PJVS systems produce sinewaves with precisely calculable rms voltage and spectral content. We present measurements and calculations that elucidate sources of error in the rms voltage that are intrinsic to the digital synthesis technique and that are due to the finite rise times and transients that occur when switching between the discrete voltages. Our goal is to reduce all error sources and uncertainty contributions from the PJVS-synthesized waveforms to be a few parts in 107, so that the overall uncertainty in the ac power standard will be a few parts in 10^6.
IEEE Transactions on Instrumentation and Measurement


AC measurements, Josephson arrays, Josephson devices, Josephson voltage standard


Burroughs, C. , Benz, S. , Dresselhaus, P. , Chong, Y. , Waltrip, B. , Nelson, T. , Williams, J. , Henderson, D. , Patel, P. , Palafox, L. and Behr, R. (2008), Development of a 60 Hz Power Standard using SNS Programmable Josephson Voltage Standards, IEEE Transactions on Instrumentation and Measurement, [online], (Accessed April 12, 2024)
Created April 6, 2008, Updated October 12, 2021