Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 30: Poster: Interaction with VUV and X-ray light

A 30.3: Poster

Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof

THz-XUV Pump-Probe Experiment Using a REMI at FLASH — •Jakob Kunz¹, Georg Schmid¹, Kirsten Schnorr¹, Nikola Stojanovic², Artem Rudenko³, Lutz Foucar⁴, Arne Senftleben¹, Shaofeng Zhang¹, Thomas Pfeifer¹, Joachim Ullrich⁵, Yuhai Jiang⁶, Alexander Broska¹, Michael Gensch⁷, Alaa Al-Shemmary², Matthias Kuebel⁸, Claus-Dieter Schroeter¹, and Robert Moshammer¹ — ¹MPIK Heidelberg — ²DESY Hamburg — ³Kansas State University Manhattan — ⁴ASG Hamburg — ⁵PTB Braunschweig — ⁶Shanghai Advanced Research Institute — ⁷Hemholtz-Zentrum Dresden-Rossendorf — ⁸MPQ Garching

Using a Reaction Microscope (REMI) we study the fragmentation dynamics of atoms and molecules in a pump-probe scheme with a fs XUV-pulse at 58 eV and a fully synchronized strong THz-pulse at a wavelength of 150 µm. The three dimensional momenta of all charged particles are reconstructed which allows in particular the investigation of angular distributions and energies as a function of the time delay.
Streaking of ions and electrons originating from ionization of atoms and molecules is demonstrated. We map the shape of the THz pulse via emission of photoelectrons created by the XUV-pulse into the THz field. Furthermore streaking as a tool to trace atomic processes, such as Auger decay in real time is discussed.