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Comparing room temperature and cryogenic cesium fountains

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10 Author(s)
Heavner, T.P. ; Time & Freq. Div., NIST, Boulder, CO, USA ; Parker, T.E. ; Shirley, J.H. ; Donley, L.
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We have compared the frequency of a room-temperature cesium-fountain primary frequency standard with that of a cryogenic (~80K) cesium fountain. This comparison yields a measurement of the blackbody frequency shift of the room-temperature fountain.

Published in:

Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International

Date of Conference:

2-5 May 2011