An evaluation of the frequency shift caused by collisions with background gas in the primary frequency standard NPL-CsF2.

Abstract

Collisions between cold cesium atoms and background gas atoms at ambient temperature reduce the cold atom signal in a fountain clock and at the same time produce a shift in the measured clock frequency. We evaluate the shift in the NPL-CsF2 cesium fountain primary frequency standard based on measurements of the fractional loss of cold atoms from the atomic cloud during the interrogation time combined with a model by Gibble that quantifies the relationship between the loss and the frequency shift.

DOI: 10.1109/TUFFC.2014.6689789

Cite this paper

@article{Szymaniec2014AnEO, title={An evaluation of the frequency shift caused by collisions with background gas in the primary frequency standard NPL-CsF2.}, author={Krzysztof Szymaniec and Stephen N. Lea and Kun Liu}, journal={IEEE transactions on ultrasonics, ferroelectrics, and frequency control}, year={2014}, volume={61 1}, pages={203-6} }