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Open AccessArticle

Selection of CVD Diamond Crystals for X-ray Monochromator Applications Using X-ray Diffraction Imaging

Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, USA
Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853, USA
Author to whom correspondence should be addressed.
Crystals 2019, 9(8), 396;
Received: 22 June 2019 / Revised: 19 July 2019 / Accepted: 28 July 2019 / Published: 31 July 2019
(This article belongs to the Special Issue Synthesis and Characterization of Diamond Crystals)
A set of 20 single crystal diamond plates synthesized using chemical vapor deposition (CVD) was studied using X-ray diffraction imaging to determine their applicability as side-bounce (single-reflection) Laue monochromators for synchrotron radiation. The crystal plates were of optical grade (as provided by the supplier) with (001) nominal surface orientation. High dislocation density was found for all samples. Distortions in the crystal lattice were quantified for low-index Laue reflections of interests using rocking curve topography. Maps of effective radius of curvature in the scattering plane were calculated using spline interpolation of the rocking curve peak position across the studied plates. For several selected plates, nearly flat regions with large effective radius of curvature were found ( R 0 30 70 m, some regions as large as 1 × 4 mm 2 ). The average width of the rocking curve for these regions was found to be about 150 μ rad (r.m.s.). These observations suggest that the selected CVD diamond plates could be used as intermediate-bandwidth monochromators refocusing the radiation source to a specific location downstream with close to 1:1 distance ratio. View Full-Text
Keywords: CVD diamond; X-ray monochromator; synchrotron radiation CVD diamond; X-ray monochromator; synchrotron radiation
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MDPI and ACS Style

Stoupin, S.; Krawczyk, T.; Liu, Z.; Franck, C. Selection of CVD Diamond Crystals for X-ray Monochromator Applications Using X-ray Diffraction Imaging. Crystals 2019, 9, 396.

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