Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster: Quantum Optics and Photonics III
Q 57.30: Poster
Thursday, March 14, 2019, 16:15–18:15, S Fobau Physik
High-precision linear ion trap for the demonstrator of a commercial multi-ion optical clock — •Malte Brinkmann1, Alexandre Didier1, Hendrik Siebeneich2, Michael Johanning2, Christof Wunderlich2, Stefan Brakhane3, Dieter Meschede3, and Tanja E. Mehlstäubler1 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Universität Siegen, Germany — 3Universität Bonn, Germany
Today’s best ion optical clocks have demonstrated fractional systematic uncertainties of a few parts in 1018 and are based on single ions. This outstanding performance is nevertheless limited by the low fluorescence given by a single ion. Performing spectroscopy on multiple chains of ions in a scalable linear ion trap is a way to push down these uncertainties even further.
Optical clock experiments are complex, bulky and can be operated by trained scientists only. The opticlock consortium develops a robust and easy-to-use demonstrator of a commercial optical clock. In the frame of the project we develop a multi-ion trap which will be integrated in a compact system.
The trap is composed of a stack of four laser-cut and gold coated AlN wafers comprising electrodes used for applying the rf and dc fields required for the trapping and control of multiple Coulomb crystals. The electrodes’ geometry is optimized via FEM simulations for small micromotion suitable for clock operation. We present the fabrication of the high-precision trap, which is assembled with tolerances below 10 µ m, and a first produced test version.