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Systematic Error Resolved in NIST Johnson Noise Thermometer



Alessio Pollarolo, Weston L. Tew, Horst Rogalla, Samuel P. Benz


In the Johnson Noise Thermometry approach, Boltzmann’s constant k is obtained as the ratio of the noise power measured across a sense resistor at the triple point of water and the noise power measured for a synthesized reference waveform. The reference waveform is synthesized by an array of Josephson junctions. In this paper, we show how an unwanted offset in the constant term of the two parameter nist-equation used to fit the noise power ratio produced a systematic error in our measured value of k.
Proceedings Title
Conference on Precision Electromagnetic Measurements Conference Digest
Conference Dates
August 24-29, 2014
Conference Location
Rio de Janeiro, -1
Conference Title
Conference on Precision Electromagnetic Measurements


Boltzmann equation, Josephson junction, measurement units, noise measurement, standards, temperature measurement
Created August 24, 2014, Updated November 10, 2018