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Development of a Quantum-Voltage-Calibrated Noise Thermometer at NIM

Published

Author(s)

Jifeng Qu, Samuel Benz, Jianqiang Zhang, Horst Rogalla, Yang Fu, Alessio Pollarolo, Jintao Zhang

Abstract

A quantum-voltage-calibrated Johnson-noise thermometer was developed at NIM, which measures the Boltzmann constant k through comparing the thermal noise across a 100  sense resistor at the temperature of the triple point water to the comb-like voltage waveform synthesized with a bipolar-pulse-driven quantum-voltage-noise source. A measurement with integration period of 10 hours and bandwidth of 640 kHz results in a relative offset of 0.5x10^-6 from the current CODATA value of k, and a type A relative standard uncertainty of 23x10^-6. Benefiting from closely matched noise power and transmission line impedances, small nonlinearities in the cross-correlation electronics, and some other possible reasons, the derived k shows self-consistent values and standard uncertainties for different measurement bandwidths.
Proceedings Title
Temperature: Its Measurement and Control in Science and Industry, Vol. 8
Volume
8
Conference Dates
March 19-23, 2012
Conference Location
Anaheim, CA, US
Conference Title
9th International Temperature Symposium (ITS9)

Keywords

Boltzmann constant, Correlation, Josephson junction arrays, Noise, Quantization, Thermometry

Citation

Qu, J. , Benz, S. , Zhang, J. , Rogalla, H. , Fu, Y. , Pollarolo, A. and Zhang, J. (2013), Development of a Quantum-Voltage-Calibrated Noise Thermometer at NIM, Temperature: Its Measurement and Control in Science and Industry, Vol. 8, Anaheim, CA, US, [online], https://doi.org/10.1063/1.4821369, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910779 (Accessed April 12, 2024)
Created September 10, 2013, Updated October 12, 2021