Multiple-detector System for Powder Diffraction Using Synchrotron Radiation

A multiple-detector system for powder diffraction using synchrotron radiation was built and has been operated at the Photon Factory in Tsukuba since May, 1995. The optics design is based on a flat-specimen-reflection geometry using parallel-beam, and the intensity data are collected by using asymmetric 2@stepscanning at a fixed incident angle. The multiple-detector system makes it possible to collect the high-resolution diffraction data in a moderate data collection time of 4 to 7 hours per sample. The performance of the detector system and some applications to Rietveld structure refinement are described.