Journal Article Research Support, U.S. Gov't, Non-P.H.S. surface morphology Research Support, Non-U.S. Gov't Takagi–Taupin equations X-ray crystal asymmetric diffraction X-ray rocking curves X-ray topography asymmetric monochromator computational modeling diffuse X-ray scattering double-crystal monochromator dynamical X-ray diffraction dynamical theory fixed elliptical geometry K–B mirrors grating interferometry grazing exit hard X-ray micro-focusing optics heat bump high heat load inclined double-crystal monochromator non-coplanar diffraction optics and detector beamline power spectra silicon crystals spatial coherence length surface roughness wavefront characterization