What is it about?
To generate a wide and parallel x-ray beam from diffraction, a large monochromator crystal, with a high crystalline perfection is needed. To diffract a 1.49 KeV X-ray beam, crystals with large lattice spacing are needed. One of the best crystal available for this X-ray energy is ammonium dihydrogen phosphate (ADP), but there little knownledge about the crystallographic perfection in large crystals.
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Why is it important?
The proposed X-ray expander is important because it permits to generate a parallel and wide X-ray beam, a condition which hard to fulfill on ground.
Read the Original
This page is a summary of: Characterization of ammonium dihydrogen phosphate crystals for soft X-ray optics of the Beam Expander Testing X-ray facility (BEaTriX), Journal of Applied Crystallography, May 2019, International Union of Crystallography, DOI: 10.1107/s1600576719004631.
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