Volume Modulated Diffraction X-Ray Optics

Abstract

Systematic experimental and theoretical investigations of different types of Bragg-Fresnel gratings, both static and dynamic, are discussed. Static gratings are produced by etching in a multilayer or by evaporating gold or nickel masks on the surfaces of symmetric or asymmetric Si [111] crystals. These have been used to obtain X-ray diffraction at different energies. The properties of both sagittal and meridional diffraction gratings are discussed. Dynamic diffraction gratings are produced by propagating a surface acoustic wave along a piezoelectric crystal. Experimental data are compared with the theoretical calculations.