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PUBLICATIONS

Progress towards comparison of quantum and classical vacuum standards

Published

Author(s)

Daniel Barker, Nikolai Klimov, Eite Tiesinga, James A. Fedchak, Julia Scherschligt, Stephen Eckel

Abstract

We present our progress towards a comparison of NIST's cold atom primary vacuum standard and a dynamic expansion vacuum standard. The cold atom vacuum standard (CAVS) converts the loss rate of atoms from a magnetic trap to a vacuum pressure using ab initio calculations of the quantum atom-molecule collision cross-section. To validate the CAVS, we have constructed a new flowmeter and dynamic expansion system that can produce low-uncertainty pressures in the ultra-high-vacuum range that is required for atom trapping. We discuss the operation and systematics of both the CAVS and flowmeter.
Proceedings Title
Measurement: Sensors
Volume
18
Conference Dates
August 30-September 3, 2021
Conference Location
Yokohama, JP
Conference Title
XXIII World Congress of the International Measurement Confederation (IMEKO2021)
Pub Type
Conferences

Download Paper

https://doi.org/10.1016/j.measen.2021.100229
Local Download

Keywords

vacuum metrology, laser cooling, atom-molecule scattering
Pressure and vacuum metrology and Atomic / molecular / quantum

Citation

Barker, D. , Klimov, N. , Tiesinga, E. , Fedchak, J. , Scherschligt, J. and Eckel, S. (2021), Progress towards comparison of quantum and classical vacuum standards, Measurement: Sensors, Yokohama, JP, [online], https://doi.org/10.1016/j.measen.2021.100229, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932953 (Accessed April 30, 2024)

Created September 22, 2021, Updated November 29, 2022