Journal Article/Contribution to a conference proceedings

PUBDB-2023-00133

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coherence properties from speckle contrast analysis at the European XFEL

Dallari, F.XFEL.EU*DESY* ; Lokteva, I.XFEL.EU* ; Moeller, J.XFEL.EU* ; Jain, A.Extern*XFEL.EU* ; Roseker, W.XFEL.EU*DESY* ; Westermeier, F.XFEL.EU*DESY* ; Goy, C.DESY* ; Boesenberg, U.XFEL.EU* ; Hallmann, J.XFEL.EU* ; Rodriguez-Fernandez, A.XFEL.EU* ; Scholz, M.XFEL.EU*DESY* ; Shayduk, R.XFEL.EU* ; Madsen, A.XFEL.EU* ; Grübel, G.XFEL.EU*DESY* ; Lehmkühler, F. (Corresponding author)XFEL.EU*DESY*

2022
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/1742-6596/2380/1/012085  doi:10.3204/PUBDB-2023-00133

Abstract: 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.

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Contributing Institute(s):

1. Spectroscopy of molecular processes (FS-SMP)
2. Coherent X-ray Scattering (FS-CXS)
3. MID (XFEL_E1_MID)
4. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. MID: Materials Imaging and Dynamics (SASE2)

Appears in the scientific report 2022

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Database coverage:
; ; ; Nationallizenz

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings Laasch, W. (Editor)DESY* ; Tschentscher, T. (Editor)XFEL.EU*
Synchrotron radiation instrumentation: proceedings, 14th international conference, SRI 2021, Hamburg, Germany, March 28-April 1, 2022
2022Synchrotron Radiation Instrumentation, SRI 2021, HamburgHamburg, Germany, 28 Mar 2022 - 1 Apr 20222022-03-282022-04-01 Bristol : IOP, Journal of Physics: Conference Series 2380, (2022) [10.1088/1742-6596/2380/1/011001]2022     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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