Mechanical stretching of a perfect single crystal: a routeway to a d -spacing tunable X-ray monochromator

CUSATIS, CESAR; PIRAGIBE BARROS SILVA BORGES, EGON; TIRAO, GERMÁN ALFREDO; HONNICKE, MARCELO GONCALVES

Journal of Applied Crystallography

International Union of Crystallography (co-published with Wiley)

Año: 2022 vol. 55 p. 1205 - 1211

The feasibility of using traction forces to produce mechanical stretching/shrinkage in a perfect Si 400 single crystal is explored theoretically (by finiteelement analysis and dynamical theory of X-ray diffraction) and experimentallyin order to use it as an angular static interplanar-distance (d-spacing) tunablemonochromator, in the Bragg case. It is shown that, with traction forces of100 N and an appropriate pre-load, it is possible to scan, with a linear responseand reproducibility of 5%, a 30 eV bandwidth, which corresponds to ad-spacing scan of 7 103 A ̊ .