Dresden 2011 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 12: Femtosecond Spectroscopy III
MO 12.1: Vortrag
Mittwoch, 16. März 2011, 10:30–10:45, TOE 317
Towards ultrafast diffractive imaging of strongly aligned complex molecules: X-ray induced radiation damage — •Lotte Holmegaard1, Jochen Küpper1,2,3,4, Henry Chapman1,4, and Daniel Rolles2 — 1CFEL, DESY, Hamburg — 2CFEL, MPG-ASG, Hamburg — 3Fritz Haber Institute, Berlin — 4University of Hamburg
Emerging X-ray Free-Electron Laser Sources such as the LCLS at SLAC or the European XFEL in Hamburg have sparked novel approaches for studying ultrafast molecular dynamics. A key interest is to use strongly aligned and oriented molecules as targets in electron or X-ray diffraction experiments. As a prerequisite for realizing such experiments we have demonstrated the first adiabatic alignment measurement established at a hard X-ray FEL. Strong molecular alignment is characterized by ionization induced by the fs X-rays pulses as well as by Coulomb explosion from a short fs NIR laser pulse. The results provide the first study of ionization and radiation damage of an adiabatically aligned large/complex molecule following X-ray absorption.
This work was carried out within a collaboration for which H. Chapman, J. Küpper and D. Rolles are spokespersons. The collaboration consists of CFEL (DESY, MPG, University Hamburg), Fritz-Haber-Institute Berlin, MPI Nuclear Physics Heidelberg, MPG Seminconductor Lab, Aarhus University, FOM AMOLF Amsterdam, Lund University, MPI Medical Research Heidelberg, TU Berlin, Max Born Institute Berlin, and SLAC Menlo Park, CA, USA. The experiments were carried out using CAMP (designed and built by the MPG-ASG at CFEL) at the LCLS (operated by Stanford University on behalf of the US DOE.)