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.

PUBLICATIONS

Improvements in the NIST Johnson Noise Thermometry System

Published

Author(s)

Samuel Benz, Horst Rogalla, Rod White, Jifeng Qu, Paul Dresselhaus, Wes L. Tew, Sae Woo Nam

Abstract

We have developed a Johnson noise thermometry system that is calibrated by precision waveforms synthesized with a quantum-accurate voltage noise source (QVNS). Significant improvements to the QVNS and the cross-correlation measurement electronics have dramatically reduced systematic errors and measure-ment uncertainty. We describe some of these improve-ments and discuss the potential for this system to contribute to the redefinition of the Boltzmann constant.
Proceedings Title
Conference on Precision Electromagnetic Measurements Conference Digest
Conference Dates
June 8-13, 2008
Conference Location
Boulder, CO, USA
Conference Title
Conference on Precision Electromagnetic Measurements
Pub Type
Conferences

Download Paper

Local Download

Keywords

Correlation, Digital-analog conversion, Johnson Noise, Josephson arrays, Quantization, Signal synthesis, Standards, Thermometry
Electrical / electromagnetic metrology

Citation

Benz, S. , Rogalla, H. , White, R. , Qu, J. , Dresselhaus, P. , Tew, W. and Nam, S. (2008), Improvements in the NIST Johnson Noise Thermometry System, Conference on Precision Electromagnetic Measurements Conference Digest, Boulder, CO, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32883 (Accessed April 20, 2024)

Created June 8, 2008, Updated October 12, 2021