Challenges to miniaturizing cold atom technology for deployable vacuum metrology

Published: September 14, 2018

Author(s)

Stephen P. Eckel, Daniel S. Barker, James A. Fedchak, Nikolai N. Klimov, Eric B. Norrgard, Julia K. Scherschligt, Constantinos Makrides, Eite Tiesinga

Abstract

Cold atoms are excellent metrological tools; they currently realize SI time and, soon, SI pressure in the ultra-high (UHV) and extreme high vacuum (XHV) regimes. The development of primary, vacuum metrology based on cold atoms currently falls under the purview of national metrology institutes. Under the emerging paradigm of the ``quantum-SI'', these technologies become deployable (relatively easy-to-use sensors that integrate with other vacuum chambers), providing a primary realization of the Pascal in the UHV and XHV for the end-user. Here, we discuss the challenges that this goal presents. We investigate, for two different modes of operation, the expected corrections to the ideal cold-atom vacuum gauge and estimate the associated uncertainties. Finally, we discuss the appropriate choice of sensor atom, the light $^6$Li atom rather than the heavier $^{85}$Rb.
Citation: Metrologia
Volume: 55
Pub Type: Journals

Keywords

vacuum metrology, cold atom vacuum standard, magneto-optical trap, magnetic trap, cold core technology
Created September 14, 2018, Updated November 10, 2018