Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster Quantengase

Q 64.28: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster C

A Fermion mixture of ultracold ⁶Li and ⁴⁰K — •Antje Ludewig, Tobias Tiecke, Sebastian Kraft, Steve Gensemer, and Jook Walraven — Van der Waals-Zeeman-Instituut, Universiteit van Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands

We report on our progress in the construction of a new apparatus for the simultaneous cooling of the Fermionic alkali isotopes ⁶Li and ⁴⁰K. Our goal is to cool the mixture to degeneracy and search for novel pairing mechanisms involving Fermions of different masses.

We have constructed, for the first time, a 2D-MOT source of Li atoms directly loaded from a thermal vapor, thereby circumventing the need for a Zeeman slower. The 2D-MOT is loaded from a Li oven and as a source for K, a second 2D-MOT is loaded from ⁴⁰K-enriched thermal vapor.

The cold beams of both species are then loaded via differential pumping sections into a dual MOT in the main chamber. From there the cold atoms are transferred into a magnetic trap, where they can be cooled by forced microwave evaporation. After this cooling the atoms will be loaded into a dipole trap.

For the ⁴⁰K we have already achieved magnetic trapping and evaporation.