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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:||July 01, 2012|
|Abstract:||In 2010 NIST measured the Boltzmann constant k by use of an electronic technique that measured the Johnson noise of a 100 Ohm resistor at the triple point of water (TPW). The NIST Johnson noise thermometry (JNT) system used as a reference a voltage waveform that was synthesized with a quantum voltage noise source (QVNS) that consisted of pulse-driven arrays of Josephson-junctions. In this paper, we attempt to reproduce the previous measurement of k by repeating the JNT measurement with a 200 Ohm sense resistor and appropriately modified QVNS circuit and waveform. Preliminary results show agreement with the previous value within the measurement uncertainty.|
|Conference:||Conference on Precision Electromagnetic Measurements|
|Proceedings:||Conference on Precision Electromagnetic Measurements Conference Digest|
|Pages:||pp. 214 - 215|
|Location:||National Harbor, MD|
|Dates:||July 1-6, 2012|
|Keywords:||Boltzmann equation, Correlation, Digital-analog conversion, Josephson arrays, Measurement units, Noise Measurement, Quantization, Signal synthesis, Standards, Temperature.|
|Research Areas:||Instrumentation, Johnson Noise Thermometry, Quantum Devices, Thermometry, Quantum Electrical Measurements, Measurements|
|DOI:||http://dx.doi.org/10.1109/CPEM.2012.6250878 (Note: May link to a non-U.S. Government webpage)|
|PDF version:||Click here to retrieve PDF version of paper (2MB)|