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An alternative cold cesium frequency standard: The continuous fountain
Auteur(s)
Dudle, Gregor
Fretel, Emmanuel
Berthoud, Patrick
Maison d'édition
: Ieee-Inst Electrical Electronics Engineers Inc
Date de parution
1999
De la page
438
A la page
442
Résumé
We report on the primary frequency standard now under construction at the Observatoire de Neuchatel (ON). The design is based on a continuous fountain of laser-cooled cesium atoms, which combines two advantages: the negligible contribution of collisions to the inaccuracy and the absence of stability degradation caused by aliasing effects encountered in pulsed operation. The design is reviewed with special emphasis on the specific features of a continuous fountain, namely the source, the microwave cavity (TE021 mode), and the microwave modulation scheme, The possible sources of frequency biases and their expected contributions to the error budget are discussed. Based on present data, an accuracy in the low 10(-15) range and a short-term stability of 7 . 10(-14) are attainable simultaneously under the same operating conditions.
Nom de l'événement
Joint Meeting of the European-Frequency-and-Time-Forum/IEEE International Frequency Control Symposium
Lieu
Besancon, France
Identifiants
Type de publication
conference paper
