Patent ID: 8421007

Claim:
An X-ray detection system comprising: electron beam irradiation means for irradiating a sample with an electron beam; a diffraction grating that receives characteristic X-rays emitted from the irradiated sample and produces diffracted X-rays; a splitter for distributing a direction of propagation of the diffracted X-rays such that an imaging plane for the diffracted X-rays is assigned to plural positions spaced apart in a direction perpendicular to a direction of energy dispersion of the diffracted X-rays; and plural image sensors having a higher energy sensitivity and a lower energy sensitivity, respectively, and disposed respectively at the plural positions to which the imaging plane is assigned, wherein said splitter has a tubular X-ray guiding mirror portion made by mirrors for reflecting the diffracted X-rays, a movable mirror for distributing the direction of propagation of the diffracted X-rays in a branching portion of the guiding mirror portion, and a movable mirror controller for controlling a position of the movable mirror.