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Barometric Effect in Vapor-Cell Atomic Clocks
Résumé Vapor-cell atomic clocks are compact and high-performance frequency references employed in various appli-cations ranging from telecommunication to global positioningsystems. Environmental sensitivities are often the main sourcesof long-term instabilities of the clock frequency. Among thesesensitivities, the environmental pressure shift describes the clockfrequency change with respect to the environmental pressurevariations. We report here on our theoretical and experimentalanalysis of the environmental pressure shift on rubidium atomicfrequency standards (RAFSs) operated under open atmosphere.By using an unsealed high-performance laser-pumped rubidiumstandard, we demonstrate that the deformation of the vapor-cell volume induced by the environmental pressure changes(i.e., barometric effect) is the dominant environmental pressureshift in a standard laboratory environment. An experimentalbarometric coefficient of 8.2×10−14/hPa is derived, in goodagreement with theory and with previously reported measure-ments of frequency shifts of RAFS operated when transiting tovacuum.
   
Mots-clés Atomic clocks, barometric effect, long-termstability, pressure shift, Ramsey scheme, satellite navigation, vapor cells.
   
Citation W. Moreno, et al., "Barometric Effect in Vapor-Cell Atomic Clocks," IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL, vol. 65, p. 1500-1503, June 2018.
   
Type Article de périodique (Anglais)
Date de publication 4-6-2018
Nom du périodique IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL
Volume 65
Numéro 8
Pages 1500-1503
URL https://doi.org/10.1109/TUFFC.2018.2844020
Liée au projet FN Rubidium-Precision double resonance spectroscopy and m...