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Improvements in the NIST Johnson Noise Thermometry System

Published

Author(s)

Samuel Benz, Horst Rogalla, Rod White, Jifeng Qu, Paul Dresselhaus, Wes L. Tew, Sae Woo Nam

Abstract

We have developed a Johnson noise thermometry system that is calibrated by precision waveforms synthesized with a quantum-accurate voltage noise source (QVNS). Significant improvements to the QVNS and the cross-correlation measurement electronics have dramatically reduced systematic errors and measure-ment uncertainty. We describe some of these improve-ments and discuss the potential for this system to contribute to the redefinition of the Boltzmann constant.
Proceedings Title
Conference on Precision Electromagnetic Measurements Conference Digest
Conference Dates
June 8-13, 2008
Conference Location
Boulder, CO, USA
Conference Title
Conference on Precision Electromagnetic Measurements

Keywords

Correlation, Digital-analog conversion, Johnson Noise, Josephson arrays, Quantization, Signal synthesis, Standards, Thermometry

Citation

Benz, S. , Rogalla, H. , White, R. , Qu, J. , Dresselhaus, P. , Tew, W. and Nam, S. (2008), Improvements in the NIST Johnson Noise Thermometry System, Conference on Precision Electromagnetic Measurements Conference Digest, Boulder, CO, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32883 (Accessed April 21, 2024)
Created June 8, 2008, Updated October 12, 2021