Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster II

Q 55.23: Poster

Thursday, March 11, 2010, 16:00–19:00, Lichthof

Design of a hexapole-compensated magneto-optical trap without external fields — •Stefan Jöllenbeck, Jan Mahnke, Jan Arlt, Carsten Klempt, and Wolfgang Ertmer — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover

The production of Bose-Einstein condensates with a high repetition rate constitutes a large step towards atom interferometry with coherent matter waves. Our approach is to load atoms into a chain of magnetic traps generated by planar wire structures where they can be transported and cooled to quantum degeneracy. Magnetic offset fields used in a conventional magneto-optical wire trap disturb the parallel trapping of more than one cloud at a time. Here we present a new setup to generate a magnetic quadrupole field with nine planar wires placed outside our vacuum system. By minimizing the hexapole components of the magnetic field, a large effective trapping volume is obtained. We expect large trapping efficiencies for pre-cooled atoms provided by a two-dimensional magneto-optical trap. Such a mesoscopic trap with high particle numbers may serve as an ideal starting point for the production of many Bose-Einstein condensates in fast sequence.