Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 1: Interaction with VUV and X-ray light (FEL) I
A 1.5: Talk
Monday, March 14, 2011, 12:15–12:30, BAR 205
Probing XUV FEL pulses with pump-probe autocorrelation — •Arne Senftleben1, Moritz Kurka1, Yuhai Jiang1, Artem Rudenko2, Oliver Herrwerth3, Lutz Foucar2, Kai-Uwe Kühnel1, Matthias Kling3, Stefan Düsterer4, Claus-Dieter Schröter1, Robert Moshammer1, and Joachim Ullrich1 — 1Max-Planck-Institut für Kernphyik, Heidelberg — 2Max-Planck Advanced Study Group at CFEL, Hamburg — 3Max-Planck-Institut für Quantenoptik, Garching — 4DESY, Hamburg
Using a split-mirror stage combined with a reaction microscope, autocorrelation traces of XUV pulses from the free-electron laser (FEL) at Hamburg were recorded for multiple ionization of atomic and molecular targets. Two characteristic time scales can be identified: the pulse-envelope duration and a substantially shorter coherence time. We conclude that the latter is a consequence of the internal pulse structure generated by the laser source. It is envisioned that this allows future pump-probe measurements with temporal resolution beneath the pulse duration. We reproduce and further characterise the FEL pulses using a partial-coherence model.