Barometric Effect in Vapor-Cell Atomic Clocks
Willam Moreno, Christoph Affolderbach, Matthieu Pellaton & Gaetano Mileti
| 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... |