Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 23: Poster II - Interaction with strong or short laser pulses
A 23.8: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster B
Imaging of clusters by femtosecond scattering of intense soft X-rays — •Ekaterina Eremina1, Christoph Bostedt1, Matthias Hoener1, Heiko Thomas1, Thomas Möller1, Tim Laarman2, Hubertus Wabnitz3, and Antonio Rubens Britto de Castro4 — 1Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 2Max-Born-Institut, Max-Born-Straße 2A, 12489 Berlin, Germany — 3DESY, Notkestr. 85, 22603 Hamburg, Germany — 4LNLS, IFGW UNICAMP,Campinas SP Brazil
Imaging of non-periodic structures, such as macromolecules and nanoparticles is one of the most attractive perspectives for the upcoming X-ray FELs [1,2]. We present the first results on imaging of rare gas clusters by means of scattering of 32nm and 13.6 nm photons from the FLASH (Free-Electron-Laser at DESY, Hamburg). Single shot diffraction patterns could be recorded before the radiation damage on clusters took place during an intense (1014 - 1015 W/cm2) 25 fs pulse. A novel MCP-based imaging detector system was developed for these experiments [3]. Model calculations for spherical clusters based on Mie-scattering theory agree well with the experimental data. The results provide a basis for future two-color pump-probe experiments, which allow time-resolved investigations of fragmentation and explosion dynamics of clusters exposed to intense x-rays.
[1] R. Neutze et al., Nature 406, 752 (2000)
[2] H.N. Chapman et al., Nature Phys. 2, 839 (2006)
[3] E. Eremina et al., DESY report (2006)