Speaker
Vahan Kocharyan
Description
The problem of dynamic diffraction of X-rays from a point source on the spatial lattice of a crystal with a weak deformation field is considered. Theoretical study is based on the asymptotic representation of the Green-Riemann function for a pair of Takagi-Taupin equations of the hyperbolic type. Experimental studies were carried out on quartz crystals in the presence of a temperature gradient perpendicular to the reflecting planes. The conditions and characteristics of focusing depending on the distances source-crystal-detector and parameter of the deformation field are considered.
