X-RAY WAVEGUIDE

摘要

An X-ray waveguide includes a core (101) to guide X-rays in a wavelength band where the real part of the refractive index of a material is 1 or less, and a cladding (102) to confine the X-rays to the core, in which the core includes a periodic structure having basic structures that contain materials having different real parts of refractive indices, the basic structures being periodically arranged, a low electron density layer (103) is arranged between the core and the cladding and has a lower electron density than that of a material having the highest electron density of all the materials constituting the core, and the critical angle for total reflection of the X-rays at the boundary between the cladding and the low electron density layer is larger than the Bragg angle attributed to the periodicity of the basic structures in the periodic structure of the core.