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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster Quantengase

Q 27.7: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

Towards a degenerate mixture of ⁶Li and ⁴⁰K — •Antje Ludewig, Tobias Tiecke, Sebastian Kraft, Steve Gensemer, and Jook Walraven — Van der Waals-Zeeman-Instituut, Universiteit van Amsterdam, The Netherlands

We have constructed an apparatus for the simultaneous cooling of the fermionic isotopes ⁶Li and ⁴⁰K. Our goal is to get a degenerate mixture to search for novel pairing mechanisms involving fermions of different masses.

Instead of using a Zeeman slower as a source for cold lithium atoms we have developed a lithium 2D-MOT which is loaded directly from thermal vapor emitted by an hot oven at 400C. A second 2D-MOT, loaded from ⁴⁰K enriched vapor, serves as a potassium source.

Using these bright sources we load via differential pumping sections 10⁹ atoms of both ⁶Li and ⁴⁰K into a dual MOT in the main vacuum chamber. We then transfer both species into a magnetic trap and cool them by forced evaporation.

The current status of the experiment is summarized on the poster.