Speaker
Prof.
Tanja Mehlstaeubler
(Physikalisch-Technische Bundesanstalt)
Description
We present first optical clock measurements of an indium multi-ion clock with sympathetically cooled Coulomb crystals. The indium absolute frequency was measured against PTBs cesium fountains. The optical frequency ratio of the 115In+ ion clock transition has been measured against optical clocks at PTB, INRIM and SYRTE in an international clock comparison campaigne. The concept of a mixes-species optical clock and uncertainties of multi-ion operation are discussed.
