This paper describes the new twin laser-cooled Cs fountain primary frequency standards NIST-F2 and IT-CsF2, and presents some of their design features. Most significant is a cryogenic microwave interrogation region which dramatically reduces the blackbody radiation shift. We also present a preliminary accuracy evaluation of IT-CsF2.

Cryogenic Fountain Development at NIST and INRIM: Preliminary Characterization / Levi, F., Calosso, C.E., Calonico, D., Lorini, L., Bertacco, E.k., Godone, A., Costanzo, G.a., Mongino, B., Jefferts, S.r., Heavner, T.p., Donley, E.a.. - In: IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL. - ISSN 0885-3010. - 57:3(2010), pp. 600-605. [10.1109/TUFFC.2010.1453]

Cryogenic Fountain Development at NIST and INRIM: Preliminary Characterization

LEVI, FILIPPO;CALOSSO, CLAUDIO ELIGIO;CALONICO, DAVIDE;LORINI, LUCA;
2010

Abstract

This paper describes the new twin laser-cooled Cs fountain primary frequency standards NIST-F2 and IT-CsF2, and presents some of their design features. Most significant is a cryogenic microwave interrogation region which dramatically reduces the blackbody radiation shift. We also present a preliminary accuracy evaluation of IT-CsF2.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/31496
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