Progress towards comparison of quantum and classical vacuum standards
Daniel Barker, Nikolai Klimov, Eite Tiesinga, James A. Fedchak, Julia Scherschligt, Stephen Eckel
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.
August 30-September 3, 2021
XXIII World Congress of the International Measurement Confederation (IMEKO2021)
, Klimov, N.
, Tiesinga, E.
, Fedchak, J.
, Scherschligt, J.
and Eckel, S.
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 December 5, 2023)