X-ray waveguide and X-ray waveguide system

摘要

An X-ray waveguide includes a core (703) having a curved portion and a cladding (701, 702). The core has a periodic structure that substances each having a different real part of refractive index are periodically arrayed perpendicularly to a guiding direction (704). A critical angle for the total reflection at a core-cladding interface is larger than a Bragg angle attributable to the periodic structure for an X-ray (705). A critical angle for the total reflection at a substance interface in the periodic structure is smaller than the Bragg angle. Following formula is satisfied:
where s is a core width in direction perpendicular to the guiding direction and parallel to a curvature radius of the curved portion, n low is a refractive-index real part of the substance having a minimum real part, n high is a refractive-index real part of the substance having a maximum real part thereof, and R is the curvature radius.