Berlin 2001 – wissenschaftliches Programm

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Q: Quantenoptik

Q 17: Poster: Cooling and Trapping

Q 17.19: Poster

Mittwoch, 4. April 2001, 12:30–15:00, AT2

An intense beam of cold Rb-Atoms from a 2D-MOT — •Jürgen Schoser, Robert Löw, Alexander Batär, Volker Schweikhard, Yuri B. Ovchinnikov, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart

We present our setup for generation of an intense beam of slow ⁸⁷Rb-atoms. We loaded a 2-dimensional magneto-optical trap (2D-MOT) in a glas cell from vapour [1], [2]. The produced beam of cold atoms is directed through a differential pumping tube into a UHV-chamber where it was analyzed.

We present our measurement of the slow atom flux as a function of the pressure in the gas-cell, the laserpower, the detuning of the MOT-laser and the length of the 2D-MOT.

This source will load a large-volume 3D-MOT which is the starting point for the generation of a Bose-Einstein-Condensate. The purpose of the project is to investigate the properties of interacting quantum-gases in optical lattices.

[1] P. Berthoud, A. Joyet, G. Dudle, N. Sagna, P. Thomann, Europhys. Lett. 41, 141 (1998)

[2] K. Dieckmann, R.J.C. Spreeuw, M. Weidemüller, J.T.M. Walraven, Phys. Rev. A 58, 3891 (1998)