Coherent properties of X-ray sources and coherence effects in X-ray optics. I - Spatial coherence of synchrotron radiation. II - Dynamic scattering of partially coherent X-ray radiation in crystals

A theoretical study is presented of the statistical properties of X-ray laser radiation, with emphasis on the spatial coherence of synchrotron radiation. The correlation properties of synchrotron radiation are examined taking into account the random radial structure of electron bunches as well as its relativistic and extended character. In addition, the theory of dynamic scattering in perfect crystals is generalized to the case of partially coherent X-rays. It is shown that temporal and spatial incoherence has a significant effect on the main physical processes: exciton beats are smoothed and the Bormann anomaly is enhanced.