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

Kai Bagschik | Zendy; Jochen Wagner | Zendy; Ralph Buß | Zendy; Matthias Riepp | Zendy; A. Kobs | Zendy; Leonard Müller | Zendy; Jens Buck | Zendy; Florian Trinter | Zendy; Frank Scholz | Zendy; Jörn Seltmann | Zendy; Moritz Hoesch | Zendy; Jens Viefhaus | Zendy; G. Grübel | Zendy; Hans Peter Oepen | Zendy; Robert Frömter | Zendy

Open Access

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

Author(s) -

Kai Bagschik,

Jochen Wagner,

Ralph Buß,

Matthias Riepp,

A. Kobs,

Leonard Müller,

Jens Buck,

Florian Trinter,

Frank Scholz,

Jörn Seltmann,

Moritz Hoesch,

Jens Viefhaus,

G. Grübel,

Hans Peter Oepen,

Robert Frömter

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.382608

Subject(s) - beamline , optics , coherence (philosophical gambling strategy) , nanodot , fourier transform , coherence time , physics , coherence length , spatial coherence , scattering , beam (structure) , laser , optoelectronics , superconductivity , quantum mechanics

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.

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