Investigation of systematic errors of an AC Jospehson Voltage Standard
NRC Institute for National Measurement Standards; National Research Council Canada
2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), 1-6 July 2012, Washington, DC, USA
2012 Conference on Precision Electromagnetic Measurements
Josephson effect; calibration; digital-analog conversion; superconducting arrays; voltage measurement; signal synthesis
This paper presents results of experiments quantifying two systematic errors associated with the calibrations by use of an AC Josephson Voltage Standard: the change in the voltage leads error with the change in the level of probe immersion in the liquid helium, and the effect of the internal inductance of a Josephson array. The measurements were performed at frequencies 100 kHz and above, however, they can be used in evaluating an error budget at lower frequencies.