Title :
The cryogenic fountain ITCsF2
Author :
Levi, Filippo ; Calosso, Claudio ; Calonico, Davide ; Lorini, Luca ; Bertacco, Elio K. ; Godone, Aldo ; Costanzo, Giovanni A. ; Mongino, Barbara ; Jefferts, Steven R. ; Heavner, Thomas P. ; Donley, Elizabeth A.
Author_Institution :
Ist. Naz. di Ricerca Metrologica, Torino, Italy
Abstract :
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.
Keywords :
atomic clocks; caesium; cryogenics; frequency standards; laser cooling; IT-CsF2; NIST-F2; blackbody radiation shift; cryogenic fountain; frequency standards; twin laser cooled caesium fountain; Cryogenics; Frequency conversion; Laboratories; Masers; NIST; Nitrogen; Optical design; Temperature dependence; Testing; Uncertainty;
Conference_Titel :
Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International
Conference_Location :
Besancon
Print_ISBN :
978-1-4244-3511-1
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2009.5168289
