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|Author(s):||Alessio Pollarolo; Tae H. Jeong; Samuel P. Benz; Horst Rogalla;|
|Title:||Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor|
|Published:||June 01, 2013|
|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|
|Pages:||pp. 1512 - 1517|
|Keywords:||Boltzmann equation, Josephson junction, measurement units, noise measurement,, standards, temperature.|
|Research Areas:||Johnson Noise Thermometry, Quantum Devices, Thermometry, Quantum Electrical Measurements|
|DOI:||http://dx.doi.org/10.1109/TIM.2013.2239033 (Note: May link to a non-U.S. Government webpage)|
|PDF version:||Click here to retrieve PDF version of paper (798KB)|