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A vacuum-compatible photon-counting hybrid pixel detector has been installedin the ultra-high vacuum (UHV) reflectometer of the four-crystal monochromator(FCM) beamline of the Physikalisch-Technische Bundesanstalt (PTB) at theelectron storage ring BESSY II in Berlin, Germany. The setup is based on thePILATUS3 100K module. The detector can be used in the entire photon energyrange accessible at the beamline from 1.75 to 10 keV. Complementing the alreadyinstalled vacuum-compatible PILATUS 1M detector used for small-angle scattering(SAXS) and grazing incidence SAXS (GISAXS), it is possible to access largerscattering angles. The water-cooled module is located on the goniometer arm andcan be positioned from -90{\deg} to 90{\deg} with respect to the incoming beamat a distance of about 200 mm from the sample. To perform absolute scatteringexperiments the linearity, homogeneity and the angular dependence of thequantum efficiency, including their relative uncertainties, have beeninvestigated. In addition, first results of the performance in wide-angle X-rayscattering (WAXS), X-ray diffraction (XRD) and X-ray reflectometry (XRR) arepresented.

review of scientific instruments online/review of scientific instruments

Vacuum-compatible photon-counting hybrid pixel detector for wide-angle  X-ray scattering, X-ray diffraction and X-ray reflectometry in the tender  X-ray range