In this class of components, we are concerned with elastic Bragg scattering from monochromators. Monochromator_flat models a flat thin mosaic crystal with a single scattering vector perpendicular to the surface. The component Monochromator_curved is physically similar, but models a singly or doubly bend monochromator crystal arrangement.
A much more general model of scattering from a single crystal is found in the component Single_crystal, which is presented under Samples, chapter 9.