Author:
Mocella V.,Lee W.-K.,Tajiri G.,Mills D.,Ferrero C.,Epelboin Y.
Abstract
A new computational approach to the Takagi–Taupin equations for the analysis of X-ray optics is presented and applied to heat-loaded synchrotron monochromators. The new numerical approach is based on the assumption that the incoming wave is completely incoherent (incoherent point source). The simulation avoids any kind of simplification: it takes into account the thermal deformation of the crystals calculated by the finite-element method, the transverse beam direction and the beam spatial distribution. As an application example, the theoretical rocking curves for low-energy low-order and high-energy high-order reflections are compared with results of measurements carried out at the Advanced Photon Source (APS) on a cryogenically cooled double-crystal monochromator. The good agreement shows that the adopted approach succeeds in simulating very closely the actual experimental setup while exhibiting satisfactorily short execution times.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology
Cited by
27 articles.
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