Title :
Comparison of two cesium fountain primary frequency standards
Author :
Santarelli, G. ; Abgrall, M. ; Zhang, S. ; Lemonde, P. ; Laurent, Ph. ; Clairon, A.
Author_Institution :
Lab. Primaire du Temps et des Frequences, Paris, France
Abstract :
Two cesium fountain frequency standards are now in operation at BNM-LPTF, FO1 and the transportable PHARAO fountain. We present a first accuracy evaluation of the PHARAO fountain, a new evaluation of FO1, and a frequency comparison between both clocks. They are found to agree to better than 2/spl times/10/sup -15/.
Keywords :
atomic clocks; cesium; frequency stability; frequency standards; laser cooling; radiation pressure; Cs; FO1 standard; accuracy evaluation; atomic clocks; atomic fountain frequency standards; frequency comparison; optical molasses; primary frequency standards; space cold atom clock; transportable PHARAO fountain; Atom optics; Atomic measurements; Clocks; Electromagnetic heating; Frequency; Geometry; Magnetic field measurement; Pulse measurements; Switches; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851000
