The three-dimensional dynamic DuMond diagram for X-ray diffraction analysis of nearly perfect crystals

A three-dimensional dynamic DuMond diagram has been constructed, in which the three axes represent the wavelength and vertical and horizontal divergences of an X-ray beam. Such a diagram can be used to analyse successive diffraction of multiple crystals. It is simple and clear cut to use this diagram for the analysis and design of crystal collimators, monochromators and spectrometers involving nearly perfect crystals.