Description
CRISTAL is a hard X-ray diffraction beamline dedicated to the study of the structural properties of matter at different length scales, ranging from sub angstromic to millimetric lengthes, possibly in non-ambient conditions.
Coherent Diffraction Imaging in Bragg conditions (BCDI) is one of the techniques proposed to the users among a large panel. A dedicated setup displayed on Figure 1 is used, based on a piezo-goniometer installed in front a Fresnel Zone Plates focusing optics. The setup is optimized to work at 7 keV, 8.5 keV and 10 keV. The goniometer has 2 rotation degrees of freedom and allows mapping of the sample over a volume of about 1 cm3. Due to the maximum loading weight compatible with the piezo-goniometer (150 g), a limited number of sample environments are accessible. In particular, a specially designed reactor for heterogeneous catalysis at atmospheric pressure can be mounted on the piezo goniometer [1].
Figure 1: BCDI setup at the CRISTAL beamline
Several examples [2,3] illustrating the possibilities and performances of the BCDI setup at CRISTAL will be presented.
In the context of the upgrade of the SOLEIL source, perspective of the coherent diffraction imaging activity at the CRISTAL beamline will be detailed.
REFERENCES
1. A. Rochet et al., Catalysis Today 336, 169-173 (2019).
2. P. Godard et al., Journal of Applied Crystallography 56, 381-390 (2023).
3. F. Berenguer et al., Communications Materials 1, art n°19 (2020).
