Dresden 2011 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 12: Femtosecond Spectroscopy III
MO 12.2: Vortrag
Mittwoch, 16. März 2011, 10:45–11:00, TOE 317
Time-Resolved Photoelectron Diffraction in Laser-Aligned Molecules — •Daniel Rolles1,2, Artem Rudenko1,3, Jochen Küpper4,5,6, Henry Chapman4,6, and Joachim Ullrich1,3 — 1Max Planck Advanced Study Group at CFEL, Hamburg — 2Max-Planck-Institut für medizinische Forschung, 69120 Heidelberg, Germany — 3Max-Planck-Institut für Kernphysik, Heidelberg — 4CFEL at DESY, Hamburg — 5Fritz-Haber-Institut, Berlin — 6Universität Hamburg
The Br(2p) molecular-frame photoelectron angular distributions of laser-aligned dibromobenzene molecules were measured at the Linac Coherent Light Source using a velocity map imaging spectrometer. The molecules were adiabatically aligned both in 1D and 3D by a nano-second YAG laser synchronized with the FEL. In a second step, time-resolved photoelectron diffraction patterns of these laser-aligned molecules were recorded by Coulomb exploding the molecules with a femtosecond-Ti:Sa laser pulse prior to the FEL ionization and varying the delay between Ti:Sa pump and FEL probe pulse.
This work was carried out within a collaboration between CFEL (DESY, MPG, Uni Hamburg), Fritz-Haber-Institut Berlin, MPI f. Kernphysik Heidelberg, MPI Halbleiterlabor München, Aarhus University, FOM AMOLF Amsterdam, Lund University, MPI f. medizinische Forschung Heidelberg, TU Berlin, Max-Born-Institut Berlin, and SLAC Menlo Park, CA, USA, led by D. Rolles, J. Küpper and H. Chapman. The experiments were carried out using the CAMP instrument (designed and built by the MPG-ASG at CFEL) at the LCLS (operated by Stanford University on behalf of the US DOE.)