Schematic view of two-dimensional and three-dimensional X-ray microscopy. (a) White synchrotron X-rays are either passed to K–B mirrors with the monochromator removed or double-Bragg reflected as monochromatic X-rays to the K–B mirror. The focused microbeam strikes the sample and produces either a polychromatic Laue pattern on the detector or a single monochromatic Bragg reflection. (b) Same as (a), but with a Pt diffracted-beam profiler wire to provide spatial resolution in three dimensions. Adapted from Yang, Larson, Tischler et al. (2004) with permission.