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A: Fachverband Atomphysik
A 20: Experiments with FLASH and FEL perspectives: an overview
A 20.5: Talk
Thursday, March 13, 2008, 12:15–12:30, 3C
Ultrafast imaging of clusters with intense soft - ray pulses from the FLASH - FEL — •Christoph Bostedt1, Ekaterina Eremina1, Daniela Rupp1, Markus Adolph1, Heiko Thomas1, Matthias Hoener1, Hubertus Wabnitz2, Rolf Treusch2, and Thomas Möller1 — 1IOAP - Technische Universität Berlin — 2Hasylab at DESY
Intense, short laser pulses in the x-ray regime from free-electron lasers (FELs) hold great promise for future single-shot imaging experiments on individual molecules. We have performed first scattering experiments on atomic clusters with λ=13 nm laser pulses at intensities up to 1014 W/cm2 from the FLASH-FEL at DESY in Hamburg. The data shows clear diffraction patterns for single cluster, two-cluster, and double-cluster events. Comparing the scattering data to classical Mie theory unveils distinct differences for the depth of the minima and the slope of the data which can be attributed to the changing optical constants of the cluster in an intense laser pulse and softening of the cluster edge due to the onset of Coulomb explosion. Further, the possibility of probing transient plasma properties through scattering experiments with atomic clusters is discussed.