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Weston L. Tew

Weston Tew is an expert in the areas of thermal and electrical metrology. He has experience in precision electrical measurements, low temperature thermometry, noise thermometry, non-metal fixed points, and industrial thermometry and is an author of more than 70 papers on these subjects. Dr. Tew is a member the International Electrotechnical Commission, Working Group 5 on Temperature Sensors of the subcommittee 65B. He is also a member of:  the ASTM International Committee E20 on Temperature Measurement; The Institute of Electrical and Electronic Engineers; and the American Physical Society. He has been a staff physicist in the NIST Process Measurements Division and the Sensor Science Division since 1993 where he is responsible for cryogenic resistance thermometer calibrations and maintenance of the ITS-90 below 84 K. His research interests are in temperature standards, resistance thermometry, Johnson noise thermometry, fixed points, and condensed-matter physics.

Publications

Johnson Noise Thermometry

Author(s)
Weston L. Tew, Jifeng Qu, K L. Zhou, Samuel P. Benz, Horst Rogalla, David R. White
Johnson noise thermometers infer thermodynamic temperature from measurements of the thermally-induced current fluctuations that occur in all electrical

A Boltzmann Constant Determination Based on Johnson Noise Thermometry

Author(s)
Nathan E. Flowers-Jacobs, Alessio Pollarolo, Kevin J. Coakley, Anna E. Fox, Horst Rogalla, Weston L. Tew, Samuel P. Benz
A value for the Boltzmann constant was measured electronically using an improved version of the Johnson Noise Thermometry (JNT) system at the National Institute

Improved spectra aberration in the Johnson Noise Thermometry

Author(s)
Alessio Pollarolo, Horst Rogalla, Anna E. Fox, Kevin J. Coakley, Weston L. Tew, Samuel P. Benz
SPECTRAL ABERRATION HAS BEEN FOR A LONG TIME THE MAIN SOURCE OF UNCERTAINTY IN THE JOHNSON NOISE THERMOMETRY APPROACH TO MEASURING THE BOLTZMANN CONSTANT
Created October 9, 2019