Yanchuk I. Phase-contrast X-ray tomography and interferometry of structural disorders in crystals

The peculiarities of the formation of moiré images, that occur in the deformation field formed by the action of one-dimensional rows of local concentrated forces on the output sur-face of the analyzer LLL-interferometer for cases of their orientation parallel or perpendicular to the diffraction vector, were established. It is shown that the phase moiré is a kind of probe, which can be used to estimate the magnitude of the deformation of individual concentrated loads according o the change of periods of moiré bands, as well as to determine changes in to-tal deformation field. It is established that there is a correlation between the values of total load and average frequency, which allows to establish a functional relationship between them. A method, that allows to find the dependence between average spatial frequencies of the energy spectra of moiré images and total load, is proposed. New approaches to the analysis of moiré intensity distributions, based on the Fourier en-ergy spectrum method, have been developed. Different sensitivity to the nature of deformation sources distribution in low- and high-frequency ranges of the radial distributions of the energy spectra of moiré images has been established. It is established that in the case of formation of moiré stripes on the deformation field, created by two separate rows of concentrated loads, oriented in parallel, perpendicularly or at an angle, it has common and different features. Different features are in the formation of vari-ous in period and shape moiré stripes systems near rows of concentrated loads. The common is that, elliptical moiré stripes are formed on the resulting deformation field at a distance from the rows.