DocumentCode
2990732
Title
Comparison with an uncertainty of 2×10-16 between two primary frequency standards
Author
Mandache, Cipriana ; Vian, C. ; Rosenbusch, P. ; Marion, H. ; Laurent, Ph ; Santarelli, G. ; Bize, S. ; Clairon, A. ; Luiten, A.N. ; Tobar, M.E. ; Salomon, C.
Author_Institution
LNE-SYRTE, Obs. de Paris, France
fYear
2005
fDate
29-31 Aug. 2005
Abstract
We present a comparison between SYRTE´s Cs fountain FO1 and Cs-Rb fountain FO2 using a cryogenic sapphire oscillator (CSO) to generate an ultra-stable interrogation signal. A description of the experimental setup is given and the clock accuracies are discussed. For the first time, a frequency resolution in the low 10-16 is achieved in the comparison between two primary standards. The paper also summarizes recent contributions of these fountains to research activities such as test of the stability of fundamental constants, timekeeping and test of sub-systems of the PHARAO space clock.
Keywords
atomic clocks; caesium; crystal oscillators; frequency standards; rubidium; sapphire; Cs fountain FO1; Cs-Rb fountain FO2; CsRb; PHARAO space clock; clock accuracy; cryogenic sapphire oscillator; frequency standards; ultrastable interrogation signal; Atom optics; Atomic beams; Clocks; Cryogenics; Frequency; Optical resonators; Oscillators; Stability; Testing; Uncertainty;
fLanguage
English
Publisher
ieee
Conference_Titel
Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International
Print_ISBN
0-7803-9053-9
Type
conf
DOI
10.1109/FREQ.2005.1573908
Filename
1573908
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