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A: Fachverband Atomphysik
A 11: Interaction with VUV and X-Ray Light I
A 11.8: Vortrag
Mittwoch, 10. März 2010, 12:15–12:30, B 302
From wave packet dynamics in MgH ions to X-ray structural analysis — •Steffen Kahra1, Günther Leschhorn1, Tobias Schaetz1, Agustin Schiffrin2, Ralph Ernstorfer2, Reinhard Kienberger2, Markus Kowalewski3, and Regina de Vivie-Riedle3 — 1MPQ, Garching, TIaMo — 2MPQ, Garching, AS beam lines — 3Chemie und Biochemie, LMU München
We report measurements that demonstrate the combination of precise spatial control and initialization of single molecular ions in a Paul trap with temporal resolution provided by <5 fs UV laser pulses. In this proof of method experiment we show how the temporal evolution of a vibrational wave packet in a few distinguishable isolated molecules can be followed by a dissociative pump probe scheme. This experiment can be seen as a first step on the way towards time resolved diffraction experimentes on single particles since it contains important functional components of the envisioned machine already. It is our aim to load, trap, cool and initialize molecular ions at a well defined (<1 micrometer) and known position in space in a repeatable manner in order to prepare the most suitable target for, e.g. structural analysis of molecular ions by diffraction of short and intense X-ray pulses. We describe the way to load and identify individual molecular ions in our trap and especially concentrate on how to count them reliably before and after the pump probe delay dependent dissociation. But other building blocks needed to realize the ideal target for diffraction experiments will be highlighted as well. Some of them are already proven to work in our apparatus others are prepared but still need to be connected.