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A: Fachverband Atomphysik

A 23: Poster II - Interaction with strong or short laser pulses

A 23.14: Poster

Donnerstag, 22. März 2007, 16:30–18:30, Poster B

A Lithium-MOT Target in a Reaction Microscope — Jochen Steinmann, Ganjun Zhu, •Alexander Dorn, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

In order to perform kinematically complete experiments on single, double and triple ionization of lithium induced, e.g., by electron impact or intense laser pulses we have combined for the first time a reaction microscope (combined recoil-ion and electron momentum spectrometer) with a magneto-optical trap target (MOT). A cloud of 1 mm diameter with 10 million lithium atoms cooled down well below 1 mK temperature constitutes an ideal target for high resolution momentum spectroscopy. However, a high resolution momentum measurement of ions and in particular electrons requires a pulsed mode operation of the atomic trap magnetic field.

We have successfully commissioned the apparatus and first measurements were performed for single ionization of ground state and laser excited lithium in strong near infrared fs-laser pulses.