Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Interaction with VUV and X-ray light II
A 19.5: Vortrag
Dienstag, 19. März 2013, 15:00–15:15, F 428
Revealing the structure of large water clusters with x-ray scattering at the FLASH free-electron laser — •Leonie Flückiger1, Daniela Rupp1, Mario Sauppe1, Tim Oelze1, Sebastian Schorb2, Rolf Treusch3, Christoph Bostedt2, Maria Krikunova1, and Thomas Möller1 — 1Technische Universität, Berlin — 2LCLS, SLAC National Accelerator Laboratory — 3Deutsches Elektronen-Synchrotron, Hamburg
With brilliant x-ray pulses of free-electron-lasers the structure of nanoparticles can be imaged by means of x-ray scattering. The diffraction patterns are recorded on the femtosecond timescale during the intense light pulse. Especially water is a hot topic target with its unique physical, chemical, and thermodynamic properties resulting from its three-dimensional hydrogen bond network.
For the first time water clusters have been imaged at the free-electron laser in Hamburg FLASH. The scattering patterns reveal the geometry of single water particles with various sizes in the range from nanometers to mircrometers and from different aggregation states. Upon illumination with the strong FEL pulse the sample becomes completely destroyed. Therefore, the dynamics of radiation damage - which is mostly driven by Coulomb explosion - was studied by coinsident measurement of fragment ion spectra.