Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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

Published

Author(s)

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

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

Keywords

Boltzmann equation, Josephson junction, measurement units, noise measurement, standards, temperature.

Citation

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 May 26, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created May 31, 2013, Updated October 12, 2021