Dresden 2011 – wissenschaftliches Programm
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MI: Fachverband Mikrosonden
MI 5: X-Ray Spectrometry and Tomography
MI 5.6: Vortrag
Dienstag, 15. März 2011, 11:45–12:00, BEY 81
Sequential femtosecond X-ray imaging — Christian M. Günther1,2, •Bastian Pfau1,2, Rolf Mitzner2,3, Björn Siemer3, Sebastian Roling3, Helmut Zacharias3, Oliver Kutz2, Ivo Rudolph2, Rolf Treusch4, and Stefan Eisebitt1,2 — 1TU Berlin, Institut für Optik und Atomare Physik, Hardenbergstr. 36, 10623 Berlin — 2Helmholtz-Zentrum Berlin GmbH, A.-Einstein-Str. 15, 12489 Berlin — 3Universität Münster, Physikalisches Institut, 48149 Münster — 4HASYLAB at DESY, Notkestraße 85, 22607 Hamburg, Germany
Recording a molecular movie featuring atomic spatial resolution on the femtosecond timescale set by atomic motion can be considered as the ultimate goal of dynamic real-space imaging. Free-electron x-ray lasers with their (sub)nanometer wavelength, femtosecond pulse duration and high brilliance fuel the hope that this may ultimately become possible. Here, we demonstrate a holographic imaging approach capable of recording two independent images at variable delay times between 15 fs and 15 ps. A soft-x-ray beamsplitter allows to perform a Fourier Transform holography experiment in a cross-beam setup. The two resulting holograms with inherent time difference are superimposed on the CCD detector. During the reconstruction process the images are separated in space. The concept overcomes the readout time limitations of 2D area detectors.