Berlin 2005 – wissenschaftliches Programm

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A: Atomphysik

A 13: Poster HU 2

A 13.52: Poster

Dienstag, 8. März 2005, 08:30–18:30, Poster HU

Efficient loading from high pressure MOT into UHV dipole trap — •A. Tripathi, R. Bourouis, A. Thoman, C. Kaefer, A. Kienzler, W. Lewoczko, and H. Helm — Albert-Ludwigs-Universitaet Freiburg, Physikalisches Institut, Hermann-Herder-Str. 3, 79104 Freiburg

We describe an experiment of cooling and trapping Rb-atoms using a low velocity source of Rb-atoms. Atoms are precooled in a 2D-MOT at relatively high Rb-pressure and then transferred into a UHV chamber where they are first captured in a conventional MOT and then loaded into a high power CO₂ laser trap. We have optimized the loading time of MOT in UHV chamber to be fast(1sec.) and efficient (2.5 · 10⁸ atoms/sec).In order to realize a tight focus for the dipole trap we use a short focal length lens which is located together with miniature coils inside the UHV chamber. This new setup allows us to load Rb atoms into a deeper potentialand thus obtain a high density dipole trap at a temperture of a few µ K.