Pollarolo, A.
, Jeong, T.
, Benz, S.
and Rogalla, H.
(2013),
Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor, IEEE Transactions on Instrumentation and Measurement, [online], https://doi.org/10.1109/TIM.2013.2239033, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=911711
(Accessed October 4, 2024)
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Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor
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Author(s)
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Abstract
In 2010, NIST measured the Boltzmann constant k with an electronic technique that measured the Johnson noise of a 100 Ω resistor at the triple point of water (TPW) and used a voltage waveform synthesized with a quantized voltage noise source (QVNS) as a reference. In this paper, we present measurements of k using a 200 Ω sense resistor and an appropriately modified QVNS circuit and waveform. Preliminary results show agreement with the previous value within the statistical uncertainty. Analysis is presented that identifies the largest source of uncertainty, which is the frequency dependence in the linear term of the two-parameter fit.Citation
IEEE Transactions on Instrumentation and Measurement
Volume
62
Issue
6
Pub Type
Journals
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Keywords
Boltzmann equation, Josephson junction, measurement units, noise measurement, standards, temperature.
Citation
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Created May 31, 2013, Updated October 12, 2021