%0 Conference Paper
%A Dallari, F.
%A Lokteva, I.
%A Moeller, Johannes
%A Jain, Avni
%A Roseker, W.
%A Westermeier, F.
%A Goy, C.
%A Boesenberg, U.
%A Hallmann, Joerg
%A Rodriguez-Fernandez, A.
%A Scholz, Markus
%A Shayduk, R.
%A Madsen, Anders
%A Grübel, G.
%A Lehmkühler, F.
%T Coherence properties from speckle contrast analysis at the European XFEL
%J Journal of physics / Conference Series
%V 2380
%N 1
%@ 1742-6588
%C Bristol
%I IOP Publ.
%M PUBDB-2023-00133
%P 012085
%D 2022
%X We show the results of speckle contrast analysis at the MID instrument of European XFEL in the hard X-ray regime. Speckle patterns measured from static colloidal samples are compared to results previously obtained at the SPB/SFX instrument. A high degree of coherence of 0.79 is obtained by modelling the q-dependence of the speckle contrast, that corresponds to a number of coherent modes of M = 1.7. Furthermore, the variation of contrast over many pulse trains is exceptional low, resulting in a degree of coherence with a relative standard deviation below 0.1. Our results demonstrate the high stability of coherence properties at European XFEL over many X-ray pulses and pulse trains which is a prerequisite for coherence-based techniques such as MHz X-ray photon correlation spectroscopy.
%B 14th International Conference on Synchrotron Radiation Instrumentation
%C 28 Mar 2022 - 1 Apr 2022, Hamburg (Germany)
Y2 28 Mar 2022 - 1 Apr 2022
M2 Hamburg, Germany
%F PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
%9 Journal ArticleContribution to a conference proceedings
%R 10.1088/1742-6596/2380/1/012085
%U https://bib-pubdb1.desy.de/record/491409