Stuttgart 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 12: Interaction with strong or short laser pulses III
A 12.6: Vortrag
Dienstag, 13. März 2012, 12:00–12:15, V47.03
Coulomb explosion imaging of small organic molecules at LCLS — •Benjamin Erk1,2, Artem Rudenko1,2, Daniel Rolles1,3, Benedikt Rudek1,2, Lutz Foucar1,3, Sascha Epp1,2, Max Cryle3, Ilme Schlichting1,3, Arnaud Rouzee4, Axel Hundertmark4, Tatiana Marchenko5, Mark Simon5, Christoph Bostedt6, Sebastian Schorb6, Kiyoshi Ueda7, Claus Dieter Schroeter2, and Joachim Ullrich1,2 — 1Max-Planck ASG at CFEL, DESY, Hamburg, Germany — 2MPI für Kernphysik, Heidelberg, Germany — 3MPI für Medizinische Forschung, Heidelberg, Germany — 4MBI, Berlin, Germany — 5LCPMR, Paris, France — 6LCLS, SLAC National Accelerator Laboratory, Menlo Park, USA — 7IMRAM, Tohoku University, Sendai, Japan
Fragmentation of small organic molecules by intense few-fs soft X-ray FEL-pulses has been studied using Coulomb explosion imaging. To increase and localize X-ray absorption, we studied methylselenol and ethylselenol compounds containing one high-Z atom, selenium. The experiment was conducted in the CFEL-ASG Multi-Purpose (CAMP) end station installed at the AMO beamline of the LCLS at Stanford. By measuring kinetic energies and emission angles of few ionic fragments in coincidence as a function of FEL intensity, we study sequential multi-photon absorption and reconstruct fragmentation pathways as well as molecular geometry at the moment of explosion. The results yield unique information on structural rearrangement and charge redistribution in the molecule, which has direct implications for radiation damage induced by intense X-ray pulses.