Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor

Published

July 1, 2012

Author(s)

Alessio Pollarolo, Tae H. Jeong, Samuel Benz, Horst Rogalla

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.

Proceedings Title

Conference on Precision Electromagnetic Measurements Conference Digest

Volume

28

Conference Dates

July 1-6, 2012

Conference Location

National Harbor, MD, US

Conference Title

Conference on Precision Electromagnetic Measurements

Pub Type

Conferences

Download Paper

https://doi.org/10.1109/CPEM.2012.6250878

Local Download

Keywords

Boltzmann equation, Correlation, Digital-analog conversion, Josephson arrays, Measurement units, Noise Measurement, Quantization, Signal synthesis, Standards, Temperature.

Citation

Pollarolo, A. , Jeong, T. , Benz, S. and Rogalla, H. (2012), Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor, Conference on Precision Electromagnetic Measurements Conference Digest, National Harbor, MD, US, [online], https://doi.org/10.1109/CPEM.2012.6250878, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910628 (Accessed December 12, 2024)