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TitleImprovements in the NIST Johnson noise thermometry system
Publication TypeConference Paper
Year of Publication2008
AuthorsBenz, S.P., Rogalla H., White D.R., Qu J., Dresselhaus P.D., Tew W.L., and Nam S.W.
Conference NameCPEM Digest (Conference on Precision Electromagnetic Measurements)
Date Published2008
KeywordsBoltzmann constants, Cross correlations, Electromagnetic measurements, Electromagnetism, Johnson noise thermometry, Measurement errors, Measurement uncertainties, Systematic errors, Temperature measurement, Temperature sensors, Thermometers, Uncertainty analysis, Voltage noise, Waveforms
AbstractWe have developed a Johnson noise thermometry system that is calibrated by precision waveforms synthesized with a quantized voltage noise source (QVNS). Significant improvements to the QVNS and the cross-correlation measurement electronics have dramatically reduced systematic errors and measurement uncertainty. We describe some of these improvements and discuss the potential for this system to contribute to the redefinition of the Boltzmann constant.

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