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Development of a hard X-ray split-and-delay line and performance simulations for two-color pump-probe experiments at the European XFEL
release_fgucdist6besbfho63xcajzswe
by
W. Lu,
B. Friedrich,
T. Noll,
K. Zhou,
J. Hallmann,
G. Ansaldi,
T. Roth,
Svitozar Serkez,
G. Geloni,
A. Madsen,
Stefan Eisebitt,
Technische Universität Berlin
(+1 others)
Published
by Technische Universität Berlin.
2020
Abstract
A hard X-ray Split-and-Delay Line (SDL) under construction for the Materials Imaging and Dynamics station at the European X-Ray Free-Electron Laser (XFEL) is presented. This device aims at providing pairs of X-ray pulses with a variable time delay ranging from −10 ps to 800 ps in a photon energy range from 5 to 10 keV for photon correlation and X-ray pump-probe experiments. A custom designed mechanical motion system including active feedback control ensures that the high demands for stability and accuracy can be met and the design goals achieved. Using special radiation configurations of the European XFEL's SASE-2 undulator (SASE: Self-Amplified Spontaneous Emission), two-color hard x-ray pump-probe schemes with varying photon energy separations have been proposed. Simulations indicate that more than 109 photons on the sample per pulse-pair and up to about 10% photon energy separation can be achieved in the hard X-ray region using the SDL.
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