zur Erlangung des Grades eines Doktors

iii The present third generation synchrotron sources provide intense x-ray radiation in hard x-ray regime. The sufficient coherent flux provided by these sources makes it possible to perform coherent x-ray scattering experiments. In 90´s several attempts have been made in performing speckle experiments with x-ray radiation at various surfaces which can provide sub-nm spatial resolution. However, the method is not well established as a routine characterization technique. Several details of the experimental technique and data analysis are not solved. The speckle experiments performed earlier used monochromatic coherent x-ray radiation. It has been shown that the results of such kind of measurements sensitively depend on various parameters of the experiment. Energy Dispersive Reflectometry (EDR) beamline at BESSY II SURYLGHVZKLWH´[-rays in the useful energy range of. The availability of the measured speckle data at different energies provides redundant information and is expected to be useful in making the reconstruction of surface profile simpler. In this work I measured the coherent reflectivity data at EDR bending magnet beamline a