1.
IEEE Trans Ultrason Ferroelectr Freq Control
; 57(3): 600-5, 2010 Mar.
Artículo
en Inglés
| MEDLINE
| ID: mdl-20211776
RESUMEN
This paper describes the new twin laser-cooled Cs fountain primary frequency standards NIST-F2 and ITCsF2, 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.