Development of a strontium optical lattice clock for the SOC mission on the ISS
- 1. aInstitut für Experimentalphysik, Heinrich-Heine-Universität Düsseldorf (HHU), D 40225 Düsseldorf; bSchool of Physics & Astronomy, University of Birmingham (UoB), UK B15 2TT Birmingham; cPhysikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D 38116 Braunschweig; dSYRTE, Observatoire de Paris, Avenue de l'Observatoire 61, F 75014 Paris; eNational Physical Laboratory (NPL), Hampton Road, UK TW11 0LW Teddington; fInstitut für Quantenoptik, Leibniz Universität Hannover (LUH), D 30167 Hannover; gTOPTICA Photonics AG, Lochhamer Schlag 19, D 82166 Gräfelfing
Description
The ESA mission “Space Optical Clock” project aims at operating an optical lattice clock on the ISS in approximately
2023. The scientific goals of the mission are to perform tests of fundamental physics, to enable space-assisted relativistic
geodesy and to intercompare optical clocks on the ground using microwave and optical links. The performance goal of
the space clock is less than 1 × 10-17 uncertainty and 1 × 10-15 τ-1/2 instability. Within an EU-FP7-funded project, a
strontium optical lattice clock demonstrator has been developed. Goal performances are instability below 1 × 10-15 τ-1/2
and fractional inaccuracy 5 × 10-17. For the design of the clock, techniques and approaches suitable for later space
application are used, such as modular design, diode lasers, low power consumption subunits, and compact dimensions.
The Sr clock apparatus is fully operational, and the clock transition in 88Sr was observed with linewidth as small as 9 Hz.
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Additional details
Related works
- Is supplement to
- arXiv:1603.06062 (arXiv)