期刊
COMPTES RENDUS PHYSIQUE
卷 16, 期 5, 页码 553-564出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crhy.2015.03.009
关键词
Atomic clock; Frequency metrology; Cold atoms; Magneto-optical trap; Laser cooling; Optical lattice
资金
- ESA
- DLR
- European Union Seventh Framework Programme (FP7) [263500]
- European Metrology Research Programme (EMRP) [IND14]
- EMRP participating countries within EURAMET
- European Union
- EPSRC [EP/L001713/1]
- Qtea (FP7-People-ITN-Marie-Curie Action Initial Training Network (ITN))
- Marie-Curie Action ITN FACT
- DFG within RTG [1729]
- EPSRC [EP/M013294/1, EP/L001713/1, EP/E036473/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M013294/1, EP/L001713/1, EP/E036473/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/K006479/1] Funding Source: researchfish
- UK Space Agency [ST/J004790/1] Funding Source: researchfish
Ultra-precise optical clocks in space will allow new studies in fundamental physics and astronomy. Within an European Space Agency (ESA) program, the Space Optical Clocks (SOC) project aims to install and to operate an optical lattice clock on the International Space Station (ISS) towards the end of this decade. It would be a natural follow-on to the ACES mission, improving its performance by at least one order of magnitude. The payload is planned to include an optical lattice clock, as well as a frequency comb, a microwave link, and an optical link for comparisons of the ISS clock with ground clocks located in several countries and continents. Within the EU-FP7-SPACE-2010-1 project No. 263500, during the years 2011-2015 a compact, a modular and robust strontium lattice optical clock demonstrator has been developed. The goal performance is a fractional frequency instability below 1 x 10(-15) tau(-1/2) and a fractional inaccuracy below 5 x 10(-17). Here we describe the current status of the apparatus' development, including the laser subsystems. The robust preparation of cold Sr-88 atoms in a second-stage magneto-optical trap (MOT) is achieved. (C) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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