Coulomb crystals for clocks

Project: EU project

Project Details


Investigating laser-cooled trapped ions as a reference for next generation of highest accuracy optical clocks.

Optical clocks are the most precise measurement devices available. However, further improvements are needed to extend applications e.g. in communication, navigation and science.

Project investigates laser-cooled trapped ions in Coulomb crystals as a reference for next generation of optical clocks of highest accuracy.

VTT MIKES studies theoretically and experimentally laser cooling of strontium and thorium ions.

This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.

Effective start/end date1/05/1831/10/21

Collaborative partners

  • VTT Technical Research Centre of Finland
  • German National Metrology Institute (PTB) (lead)
  • Bundesamt für Eich- und Vermessungswesen (BEV)
  • National Metrological Institute (INRIM)
  • Institute of Scientific Instruments of the CAS, v.v.i. (ISI)
  • QUEST Institute for Experimental Quantum Metrology
  • Max Planck Society
  • Vienna University of Technology (TU Wien)


  • EURAMET e.V.