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Abstract
Single crystal based optics is widely used at X-ray Free-Electron Laser (XFEL) facilities for beam tailoring. Here, we present recent developments in simulations of coherent X-ray wavefront propagation through crystals. In particular, the Laue case of dynamical diffraction has been implemented in Synchrotron Radiation Work- shop (SRW). Various effects due to wavefront transformation of short XFEL pulses have been simulated in the WavePropaGator (WPG) framework. Possible experimental observations of the effects are discussed.