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.

Comparison of two multiplexed portable cold atom vacuum standards

Published

Author(s)

Lucas Ehinger, Bishnu Acharya, Daniel Barker, James A. Fedchak, Julia Scherschligt, Eite Tiesinga, Stephen Eckel

Abstract

We compare the vacuum measured by two portable cold atom vacuum standards (pCAVS) based on ultracold $^7$Li atoms. Our pCAVS devices share the same laser system and measure the vacuum concurrently. The two pCAVS together detected a leak with a rate on the order of $10^-6}$ Pa L/s. After fixing the leak, the pCAVS measured a pressure of about 40 nPa with 2.6 % uncertainty. The two pCAVS agree within their uncertainties, even when swapping some of their component parts. Operation of the pCAVS was found to cause some additional outgassing, on the order of $10^-8}$ Pa L/s, which can be mitigated in the future by better thermal management.
Citation
AVS Quantum Science
Volume
4

Keywords

cold atom vacuum standard, UHV and XHV pressure sensors, leak detection

Citation

Ehinger, L. , Acharya, B. , Barker, D. , Fedchak, J. , Scherschligt, J. , Tiesinga, E. and Eckel, S. (2022), Comparison of two multiplexed portable cold atom vacuum standards, AVS Quantum Science, [online], https://doi.org/10.1116/5.0095011, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934515 (Accessed November 26, 2022)
Created July 15, 2022