Cryogenic fountain development at NIST and INRIM: preliminary characterization
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 preliminar...
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| Veröffentlicht in: | IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2010-03, Vol.57 (3), p.600-605 |
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| container_title | IEEE transactions on ultrasonics, ferroelectrics, and frequency control |
| container_volume | 57 |
| creator | 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. |
| description | 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. |
| doi_str_mv | 10.1109/TUFFC.2010.1453 |
| format | Article |
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Most significant is a cryogenic microwave interrogation region which dramatically reduces the blackbody radiation shift. 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| subjects | Blackbody Cryogenics Electromagnetic heating Exact sciences and technology Ferroelectric materials Frequency Frequency control Frequency standards Interrogation Laboratories Measurements common to several branches of physics and astronomy Metrology, measurements and laboratory procedures Microwaves NIST Nitrogen Physics Temperature dependence Testing Time and frequency Uncertainty |
| title | Cryogenic fountain development at NIST and INRIM: preliminary characterization |
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