Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Ultra-cold atoms, ions and BEC V (with Q)

A 20.7: Vortrag

Donnerstag, 17. März 2011, 12:00–12:15, BAR 106

Novel magnetic trap design for ultra-cold metastable helium atoms with large optical access — •Franz Sievers, Juliette Simonet, Sanjukta Roy, Jérôme Beugnon, Michèle Leduc, and Claude Cohen-Tannoudji — Laboratoire Kastler Brossel, École Normale Supérieure, 24 rue Lhomond, 75231 Paris, France

We present the design of a modified Cloverleaf-type Ioffe-Pritchard trap for Bose-Einstein condensation of ultra-cold atoms, compatible with in situ loading of the condensed gas into a three-dimensional optical lattice. The coil geometry offers optical access for three independent triplets of orthogonal laser beams that cross in the centre of the trap. Two are used for the magneto-optical trap and the projected three-dimensional optical lattice, respectively. Technical considerations of the trap design, as well as the electric circuitry for fast switching are reviewed. This set-up is intended to operate for metastable helium, but is also of practical interest for experiments with other species.