X-RAY WAVEGUIDE AND X-RAY WAVEGUIDE SYSTEM

摘要

An X-ray waveguide includes a core configured to guide X-ray therethrough and a cladding. In a section perpendicular to an X-ray guiding direction, the core has threefold or more rotational symmetry and has a periodic structure made of plural substances each having a different value of a real part of refractive-index, and a critical angle for total reflection of an X-ray at an interface between the core and the cladding is larger than a Bragg angle of the X-ray for the periodic structure of the core. A waveguide mode having a two-dimensionally spatial coherence over a wide cross-section of the core and exhibiting a small propagation loss is realized.