ADAPTIVE X-RAY OPTICS AS AN INSTRUMENT FOR TIME-RESOLVED STUDIES OF CRYSTALLINE MATERIALS UNDER STATIC MECHANICAL COMPRESSION

A new approach to timeresolved XRay experiments implementation at both laboratory XRay sources and synchrotron facilities is presented. Proposed XRay diffraction method based on adaptive Xray optics and applied for investigation of deformation processes in crystalline materials under external loading with time resolution. This method allows receiving information about changes in atomic structure recording rocking curves (the dependence of the Xray radiation intensity on the angle near Bragg angle) and reciprocal space maps (RSM) by fast tunable XRay optical element. This element consists of a piezoelectric monolithic bimorph lithium niobate (LiNbO3) single crystal and a silicon plate attached to its face. When electrical signal is applied to the lithium niobate, it is possible to control the spatial position of the diffracted Xray beam 1. Time resolution of proposed method scales up to hundreds of microseconds for rocking curve record and up to tens of seconds in RSM case, and depending on brilliance of Xray source.