The cryogenic fountain ITCsF2

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

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Published in2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum pp. 769 - 773
Main Authors Levi, F., Calosso, C., Calonico, D., Lorini, L., Bertacco, E.K., Godone, A., Costanzo, G.A., Mongino, B., Jefferts, S.R., Heavner, T.P., Donley, E.A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2009
Subjects
Cryogenics
Frequency conversion
Laboratories
Masers
NIST
Nitrogen
Optical design
Temperature dependence
Testing
Uncertainty
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Summary:This paper describes the new twin laser-cooled Cs fountain primary frequency standards NIST-F2 and IT-CsF2, and presents their most innovative design features. Most significant is a cryogenic microwave interrogation region which dramatically reduces the blackbody radiation shift. We present as well a preliminary accuracy evaluation of IT-CsF2.
ISBN:1424435110
9781424435111
ISSN:2327-1914
DOI:10.1109/FREQ.2009.5168289