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Hannover 2016 – wissenschaftliches Programm

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K: Fachverband Kurzzeitphysik

K 4: Poster

K 4.4: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Wavefront propagation study concerning the influence of non-ideal mirror surfaces inside a split-and-delay unit on the focusability of XFEL-pulses — •Victor Kärcher1, Sebastian Roling1, Liubov Samoylova2, Karen Appel2, Frank Siewert3, Harald Sinn2, Ulf Zastrau2, and Helmut Zacharias11Westfälsiche Wilhelms-Universität Münster — 2European XFEL GmbH, Hamburg — 3Helmholtz-Zentrum Berlin für Materialien und Energie

For the High Energy Density (HED) instrument at the SASE2 - Undulator at the European XFEL an x-ray split-and-delay unit (SDU) is built covering photon energies from hν = 5 keV up to hν = 24 keV. This SDU will enable time-resolved x-ray pump / x-ray probe experiments as well as sequential diffractive imaging on a femtosecond to picosecond time scale. In order to reach intensities on the order of 1015 W/cm2 the XFEL pulses will be focused by means of compound refractive lenses (CRL) to a diameter of D = 24 µ m. The influence of wavefront disturbances caused by height- und slope-errors of the mirrors inside the SDU on the quality of the two focused partial beams is studied by wavefront propagation simulations using the WPG-framework.

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