SYNTHETIC DIAMOND-BASED POSITION-SENSITIVE PHOTOCONDUCTIVE DETECTOR DEVELOPMENT FOR THE ADVANCED PHOTON SOURCE

A novel X-ray beam-position detection device that we call a position-s ensitive photoconductive detector (PSPCD) is designed to have syntheti c diamond as its substrate material. We proved that it is feasible to use synthetic diamond to make a hard X-ray position-sensitive detector based on the photoconductivity principle and that it acts as a solid- state ion chamber. Experiments on different PSPCD samples using synthe tic diamond with a high-heat-flux white undulator beam, as well as wit h monochromatic hard X-ray beams, have been performed at the Advanced Photon Source. Recent test results with the PSPCD in the quadrant conf iguration as an X-ray beam-position monitor and in a multipixel array as an X-ray beam profiler are presented in this paper.