X-ray waveguide and X-ray waveguide system

摘要

In an X-ray waveguide including a cladding (701, 702) and a core to guide an X-ray, the core includes a periodic structure of plural substances (703, 704) having different values of a refractive-index real part in a direction perpendicular to an X-ray guiding direction. A Bragg angle determined depending on an X-ray wavelength and periodicity of the periodic structure is smaller than a critical angle for total reflection of the X-ray at a core-cladding interface. The Bragg angle is larger than a critical angle for total reflection of the X-ray at an interface between the plural substances constituting the periodic structure. The core has, in the X-ray guiding direction, two or more regions (705, 706) differing in periodic number of the periodic structure constituting the core with a core width in a direction of period being different between the two or more regions corresponding to change of the periodic number.