CONSTRUCTION OF A 2-DIMENSIONAL ULTRA-SMALL-ANGLE X-RAY-SCATTERING APPARATUS

A two-dimensional ultra-small-angle X-ray scattering (USAXS) apparatus was constructed using a rotating-anode X-ray generator and a Bonse-Ha rt camera. In this camera, two sets of two channel-cut single crystals were used to collimate the X-ray beam in both the horizontal and the vertical planes. The measured intensity profile of the direct beam sho wed a high small-angle resolution in all directions on the detector pl ane. The full width at half-maximum was 17 '', indicating that the app aratus can be applied to structural analysis in the range up to 2 mu m , even for directionally oriented samples. One-and two-dimensional USA XS profiles from colloidal silica powder agreed well with each other, showing that the desmearing procedure adopted in the previous one-dime nsional USAXS experiments were justified.