Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III

We present a systematic 2D spatial-coherence analysis of the soft-X-ray beamline P04 at PETRA III for various beamline configurations. The influence of two different beam-defining apertures on the spatial coherence properties of the beam is discussed and optimal conditions for coherence-based experi...

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Bibliographic Details
Published in:Optics express 2020-03, Vol.28 (5), p.7282-7300
Main Authors: Bagschik, Kai, Wagner, Jochen, Buß, Ralph, Riepp, Matthias, Philippi-Kobs, André, Müller, Leonard, Buck, Jens, Trinter, Florian, Scholz, Frank, Seltmann, Jörn, Hoesch, Moritz, Viefhaus, Jens, Grübel, Gerhard, Oepen, Hans Peter, Frömter, Robert
Format: Article
Language:English
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Summary:We present a systematic 2D spatial-coherence analysis of the soft-X-ray beamline P04 at PETRA III for various beamline configurations. The influence of two different beam-defining apertures on the spatial coherence properties of the beam is discussed and optimal conditions for coherence-based experiments are found. A significant degradation of the spatial coherence in the vertical direction has been measured and sources of this degradation are identified and discussed. The Fourier-analysis method, which gives fast and simple access to the 2D spatial coherence function of the X-ray beam, is used for the experiment. Here, we exploit the charge scattering of a disordered nanodot sample allowing the use of arbitrary X-ray photon energies with this method.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.382608