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

Published

June 1, 2013

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

Pub Type

Journals

Download Paper

https://doi.org/10.1109/TIM.2013.2239033

Local Download

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 October 7, 2025)