Patent ID: 8744046

Claim:
A method for precise measurement of an X-ray nanobeam intensity distribution, comprising the steps of: using a dark-field metrology to run a knife edge, the knife edge being made of a heavy metal, so as to cut across an X-ray beam and measure an X-ray intensity by an X-ray detector disposed behind the knife edge at a position geometrically dark with respect to an X-ray source; measuring an X-ray intensity distribution in a cross section of the X-ray beam; advancing a phase of an X-ray passing through the knife edge, prepared so as to change in thickness continuously or stepwise in a longitudinal direction, and set so as to cut across an X-ray beam at a position of a thickness as to obtain a phase shift with which a transmission X-ray and a diffraction X-ray diffracted by a leading end of the knife edge reinforce each other; and measuring with the X-ray detector an X-ray foamed by overlapping of the diffraction X-ray and the transmission X-ray.