A new experimental station for simultaneous X-ray microbeam scanning for small- and wide-angle scattering and fluorescence at BESSY II

Abstract

A new instrument for simultaneous microbeam small-and wide-angle X-ray scattering and X-ray fluorescence (SAXS/WAXS/XRF) is presented. The instrument is installed at the microfocus beamline at BESSY II and provides a beam of 10 mm size with a flux of about 10 9 photons s À1. A SAXS resolution up to 500 Å d-spacing and a range of scattering vectors of almost three orders of magnitude are reached by using a large-area high-resolution CCD-based detector for simultaneous SAXS/WAXS. The instrument is particularly suited for scanning SAXS/WAXS/XRF experiments on hierarchically structured biological tissues. The necessary infrastructure, such as a cryo-stream facility and an on-site preparation laboratory for biological specimens, are available.

Ion-association complexes unite classical and non-classical theories for the biomimetic nucleation of calcium phosphate

“…Synchrotron small-and wide-angle scattering experiments were carried out at the m-Spot beamline at BESSY II 47 . Samples were taken at different time points and contained in a vacuum-sealed quartz capillary with a diameter of 1.5 mm (Anton Paar, Austria) mounted on a Peltier-element (TCU50, Anton Paar).…”

Capillary condensation in deformable mesopores: wetting versus nanomechanics

“…For the sake of concreteness we focus only on experiments using pentane as the adsorbate. During the sorption process in-situ X-ray diffraction measurements are performed using synchrotron radiation [22]. The experimental setup is described elsewhere [11,23] and consists essentially of a thermostatted sample chamber with X-ray transparent windows, which is connected to a fluid reservoir via a gas dosing system.…”

The grinding tip of the sea urchin tooth exhibits exquisite control over calcite crystal orientation and Mg distribution

“…Microbeam X-ray diffraction can probe volumes in the micrometer regime (10-m beam size in this work) to obtain local crystal orientation in 3-dimensions. A particularly powerful method is the combination of microbeam diffraction with scanning, that enables the production of 2-dimensional maps from the diffraction patterns (21,22). In our case, information on the magnesium distribution can be determined from the dependence of the diffraction angle of Bragg reflections on the Mg concentration (23).…”