METHOD AND APPARATUS FOR EVALUATING SUPERCONDUCTING TUNNEL JUNCTION DETECTOR NOISE VERSUS BIAS VOLTAGE

摘要

A technique for characterizing the noise behavior of a superconducting tunnel-junction (STJ) detector as a function of its applied bias voltage Vb by stepping the STJ's bias voltage across a predetermined range and, at each applied bias, making multiple measurement of the detector's current, calculating their mean and their standard deviation from their mean, and using this standard deviation as a measure of the STJ detector's noise at that applied bias.