Dresden 2011 – scientific programme

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A: Fachverband Atomphysik

A 26: Poster III

A 26.60: Poster

Thursday, March 17, 2011, 16:00–18:30, P2

Combine a Magneto-Optical Trap with a Magnetic Trap for ⁷Li Atoms — •Christoph Schreyvogel, Matthias Strebel, Frank Stienkemeier, and Marcel Mudrich — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg

We utilize a magneto-optical trap (MOT) in combination with a decreasing field type Zeeman-slower to generate an ultracold cloud of ⁷Li-Atoms for future scattering experiments (reactive and non-reactive collisions) with cold molecules produced by means of supersonic expansion out of a rotating nozzle. A special feature of our MOT-apparatus is the implementation of a magnetic trap with high field-gradients for trapping the atoms in the electronic ground state at high density. With this setup we will study reactive collisions, such as Li + HF → LiF + H at collision energies down to ≤ 1 meV from which we expect to get insight into the quantum mechanical nature of cold reaction dynamics. The required laser-system for the magneto-optical trap and Zeeman-slower is based on a "master-slave-slave" scheme. The master laser is a low-power single-mode diode laser which is used for injection-locking of two slave-lasers which in turn are used for injection-locking of two additional slave diode lasers to produce high-power narrowband radiation for the MOT-operation.