Hannover 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 13: Posters: Quantum Optics and Photonics I
Q 13.25: Poster
Montag, 9. März 2020, 16:30–18:30, Empore Lichthof
A high-flux Yb source for atom interferometry using a core-shell MOT — •Robert J. Rengelink, Etienne Wodey, Dennis Schlippert, and Ernst M. Rasel — Leibniz Universität Hannover, Institut für Quantenoptik, Germany
In high-performance atom interferometry the short term stability is ultimately limited by shot-noise and the repetition rate of the experiment. In order enable new geophysical and fundamental science applications of Very Long Baseline Atom Interferometry (VLBAI) it is therefore necessary to develop high-flux sources.
We present a high-flux ytterbium source that can be subdivided into two parts. The first consists of an oven with a microtube array nozzle, a Zeeman slower based on a Hallbach array of permanent magnets, and a 2D-MOT deflection/collimation stage. This produces a cold flux in excess of 109 atoms/s into the MOT chamber.
The second part is a two-colour MOT in a so-called core-shell configuration: A hollow beam tuned to the strong 1 S0 → 1P1 transition at 399 nm is applied to capture as much flux as possible and transfers the atoms to a central MOT at the narrow 1 S0 → 3P1 transition at 556 nm which cools them to low temperatures and traps with a long lifetime. Finally, we compare and contrast the core-shell MOT with a sequential two-colour MOT. The VLBAI facility is a major research equipment funded by the DFG. We acknowledge support from the CRCs 1128 “GeoQ” and 1227 “DQ-mat”, the Cluster of Excellence 2123 “QuantumFrontiers”, and by BMBF (13N14875)