Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.46: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Non-magnetic setup for an Indium multi-ion clock — •Tabea Nordmann, Hartmut Nimrod Hausser, Alexandre Didier, Jan Kiethe, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
Optical ion clocks are one of the most promising candidates to approach fractional uncertainties of 10−18 and below. Using N ions instead of a single ion shortens the interrogation time to reach that level by a factor 1/N compared to the latter.
In the past years we have successfully developed a new ion trapping platform which is capable of trapping ion crystals in a well-controlled environment on that accuracy level.
Here we present our new experimental apparatus for a multi-ion clock based on 115In+ ions which are sympathetically cooled with 172Yb+ ions in a mixed linear ion crystal.
Apart from the segmented AlN trap the new setup consists of a non-magnetic and low outgassing titanium vacuum chamber with a variety of laser access and magnetic field coils providing a B-field with estimated inhomogeneities below 15nT over the whole trapping area.
Furthermore, we discuss the laser systems for addressing the cooling and detection transition in indium (1S0 to 3P1), operating at 230.6nm.
The read-out of the clock is based on simultaneously imaging both ion species on one EMCCD camera by two aspheric lenses.
Photonic crystal fibers are tested as a mode cleaner for the deep UV light at 230.6nm and 236.5nm for exciting the clock transition (1S0 to 3P0).