Qu, J.
, Zhou, K.
, Rogalla, H.
, Benz, S.
and Fu, Y.
(2014),
Measurement of the Boltzmann Constant with Noise Thermometry at NIM, Conference on Precision Electromagnetic Measurements Conference Digest, Rio de Janeiro, BR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=915384
(Accessed January 14, 2025)
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Measurement of the Boltzmann Constant with Noise Thermometry at NIM
Published
Author(s)
Jifeng Qu, Kunli Zhou, , , Yunfeng Fu
Abstract
Since 2010 we have been developing a quantum-voltage-calibrated Johnson noise thermometer at NIM to measure the Boltzmann constant k. With recent improvements in grounding and shielding of the electronics, and matching of the noise sources and transmission lines, the effects of electromagnetic interference and spectral aberrations were greatly reduced. Measurements for about 140 hours integrating period resulted in measured value of k = 1.380648x10^-23 J/K and a relative uncertainty of 7.8x10^-6, which is at a relative offset of -0.6x10^-6 from the CODATA 2010 value of k.Proceedings Title
Conference on Precision Electromagnetic Measurements Conference Digest
Volume
2
Conference Dates
August 24-29, 2014
Conference Location
Rio de Janeiro, BR
Conference Title
Conference on Precision Electromagnetic Measurements
Pub Type
Conferences
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Keywords
Boltzmann constant, Correlation, Josephson arrays, Noise, Quantization, Thermometry
Citation
Issues
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Created August 23, 2014, Updated October 12, 2021