9th Symposium on Frequency Standards and Metrology

PTB’s Second-Generation Transportable Strontium Lattice Clock

Not scheduled

20m

Kingscliff, NSW, Australia

Invited Poster Molecular, Atomic, Ion and Nuclear Clocks

Speaker

Tim Lücke (Physikalisch-Technische Bundesanstalt)

Description

Due to the gravitational redshift, clocks can be utilized for height determination in geodesy. To become geodetically relevant, fractional clock frequency differences of about $1\times10^{-18}$ need to be resolvable. Our second-generation transportable strontium lattice clock represents our recent efforts in reaching the required level of accuracy with an in-field deployable device. These include a single-beam pyramid magneto-optical trap for robust cooling and trapping of strontium-$87$ atoms, a blackbody radiation (BBR) shield for fractional BBR shift uncertainties below $1\times10^{-18}$ and a transportable clock laser with an instability in modified Allan deviation of down to $1.6\times10^{-16}$.

Presentation materials

Abstract_9fsm2023_Sr4.pdf