Systematic error resolved in NIST Johnson Noise Thermometer

Author

Pollarolo, Alessio ; Tew, Weston ; Rogalla, Horst ; Underwood, Jason M. ; Benz, Samuel P.

Author_Institution

Nat. Inst. of Stand. & Technol., Boulder, CO, USA

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

26

Lastpage

27

Abstract

Johnson Noise Thermometry is an electronic approach to determine the Boltzmann constant k through measurement of the ratio of the noise power measured across a sense resistor at the triple point of water and the measured noise-power of a synthesized reference waveform. The reference waveform is synthesized by an array of Josephson junctions. In this paper, we show how incorrect averaging to determine the ratio can produce a systematic error in the measured value of k. We describe the appropriate algorithm to avoid this error.

Keywords

constants; electric noise measurement; electric sensing devices; measurement errors; power measurement; resistors; sensor arrays; superconducting junction devices; temperature measurement; temperature sensors; thermal noise; thermometers; Boltzmann constant k; Johnson noise thermometry; Josephson junction array; NIST Johnson noise thermometer; measurement error; noise power measurement; sense resistor; synthesized reference waveform; systematic error resolution; water triple point; Electrical resistance measurement; Measurement uncertainty; Noise; Noise measurement; Resistors; Systematics; Temperature measurement; Boltzmann equation; Josephson junction; measurement units; noise measurement; standards; temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898241

Filename

6898241