Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics II

Q 42.7: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Atrium Informatik

A permanent magnet based Zeeman slower for ytterbium — •Robert J. Rengelink, Etienne Wodey, Wolfgang Ertmer, Dennis Schlippert, and Ernst M. Rasel — Leibniz Universität Hannover, Institut für Quantenoptik

The Zeeman slowing technique is a standard method to decelerate an atomic beam using radiation pressure and a spatially varying magnetic field. In order to slow an atomic beam of ytterbium atoms we generate a transverse field using permanent magnets arranged in a Halbach configuration. This approach offers several advantages over a more traditional tapered coil setup: 1) Maintaining the field requires no power or cooling which reduces the weight of the setup and requires less maintenance. 2) The magnet configuration can be easily (dis)assembled without breaking vacuum and allows optical access to the beam during operation. 3) The Halbach configuration strongly suppresses the residual field outside the slower. We have implemented a permanent magnet-based slower and have characterized its performance in slowing down a beam of ytterbium atoms. Additionally we are working on a 2D-MOT for the slowed atoms which is also based on permanent magnets. This source of ultracold ytterbium atoms with low maintenance and power consumption is to become part of the very long baseline atom interferometer (VLBAI) setup currently under construction in Hannover.

The VLBAI-Teststand is a major research instrument funded by the DFG. We acknowledge support from the CRCs 1128 "geo-Q" (project A02) and 1227 "DQ-mat" (project B07).