2002/12/10 by Davide Calonico, D. Calonico, Y. Sortais +15
Decision Sciences · Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Scientific Measurement and Uncertainty Evaluation #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.physics/0212041
3 pages, 7 figures, 1 table
arxiv created 2002/12/10 · openalex publication_date 2002/12/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
At BNM-SYRTE laboratories in Paris two 133Cs fountains and a 87Rb one have been already demonstrated. This paper illustrates the construction of a 87Rb and Cs dual fountain realized within the same structure to work simultaneously. Up to now only the Cs part is under operation but Rb part, already completed, will be soon operational. The experiment has been projected to improve present fountain frequency standards and to perform a more precise laboratory test (at 10E-16 level) on a possible time variation of the fine structure constant alpha, as recent cosmological evidences strongly motivates.