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Beamline: B2

High resolution investigation of polycrystalline materials: powder diffraction and kinetic studies

Structure analyses on polycrystalline samples are a general demand in materials science, chemistry, mineralogy and physics. This experimental station at a bending magnet is a users’ dedicated instrument, offering a rich variety of sample environments and different detector systems in order to match the specific needs for a wide range of scientific cases. The different experimental conditions allow the detection and analysis of subtle structural details on one hand and to follow structure evolutions as a function of external parameters even in small steps on the other. The high-quality diffraction data can be used for ab-initio structure solutions, Rietveld refinements of structure models and the interpretation of microstructures, based on analyses of the half-widths and shapes of the reflection profiles.

Diffractometer setup

• High resolution powder diffraction at ambient conditions:

Debye-Scherrer-geometry
Bragg-Brentano-geometry
Transmission-geometry

• High and low temperature powder diffraction:

RT-10 K, He-closed cycle
RT-1200 K, capillary furnace (STOE)
RT-2200 K, Halogen-mirror furnace

• Eulerian cradle
• Special sample environments

Applications

• High resolution powder diffraction
• Kinetic studies at elevated temperatures in a time scale of minutes
• Resonant scattering
• Diffraction at high and low temperatures
• Diffraction with controlled physical parameters:

Hydrogen gas loading of nanoparticles
Electrochemical loading
Electric field (Ferroelectrica)

• Thin films and grazing incident measurements