Title :
Johnson noise thermometry measurement of the Boltzmann constant with a 200 Ω sense resistor
Author :
Pollarolo, A. ; Jeong, T. ; Benz, S.P. ; Rogalla, H.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
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 appropriately modified QVNS circuit and waveform. Preliminary results show agreement with the previous value within the statistical uncertainty.
Keywords :
constants; noise measurement; resistance thermometers; resistors; temperature measurement; Boltzmann constant k measurement; Johnson noise thermometry measurement; NIST; QVNS; TPW; electronic technique; quantized voltage noise source; resistance 100 ohm; resistance 200 ohm; sense resistor; statistical uncertainty; triple point of water; voltage waveform synthesis; Electrical resistance measurement; Frequency measurement; Noise; Noise measurement; Resistance; Resistors; Transmission line measurements; Boltzmann equation; Josephson array; measurement units; noise measurement; standards; temperature;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6250878
