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Figure 10
Coherence measurements as performed on ID19 (ESRF) via the visibility of a phase grating (Si, 6 µm periodicity) in dependence on its propagation distance to the detector. The beam passes a DCM (18 keV) before being reflected by one of the multilayer mirrors (sample 1574: Mo/Si, N = 220, d = 2.478 nm; sample 1531: W/Si, N = 120, d = 2.528 nm; sample 1680: Pd/B4C, N = 220, d = 2.468 nm). Coherence properties of the beam when passing only the DCM are shown as well. The angular source size α is calculated from the two Talbot planes given (Cloetens et al., 1997BB10). See also Figs. 8[link] and 9[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 17| Part 4| May 2010| Pages 496-510
doi:10.1107/S0909049510011623
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