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Displaying 26 - 28 of 28

Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

June 13, 2010

Author(s)

Jifeng Qu, Samuel Benz, Alessio Pollarolo, Horst Rogalla

Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard- calibrated Johnson noise thermometer (JNT) have lead to reduced uncertainty in the temperature measurement. Recent measurements show that some of the distortion in

Electronic Measurement of the Boltzmann Constant with a Quantum-Voltage-Calibrated Johnson-Noise Thermometer

November 22, 2009

Author(s)

Samuel P. Benz, D. R. White, Jifeng Qu, Horst Rogalla, Weston L. Tew

Currently, the CODATA value of the Boltzmann constant is dominated by a single gas-based-thermometry measurement with a relative uncertainty of 1.8 ձ0^-6. This paper describes an electronic approach to measuring the Boltzmann constant that compares Johnson

Reduced Nonlinearities and Improved Temperature Measurements for the NIST Johnson Noise Thermometer

July 31, 2009

Author(s)

Jifeng Qu, Samuel Benz, Horst Rogalla, David R. White

The variance of temperature measurements made with the NIST Johnson noise thermometer has been reduced by use of improved cross-correlation electronics and a unique method for measuring and reducing nonlinearities. The spectral response of the voltage

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