The Control System of Bsrf Topography Station Based on Pc

The X-ray topography station and attached beam line 4W1A are part of the Beijing Synchrotron Radiation Facility (BSRF) to employ the bright synchrotron radiation from the Beijing Electron Positron Collider (BEPC). The main purposes of the station are used for the study of the perfection of single crystals, high resolution multi-crystals diffraction and Xray standing wave research. The intense power and small angular divergence of synchrotron radiation(SR) allow the setting of the specimen to a longer distance from the source and a shorter exposure time, to gain better spatial resolution in imagine. The use of large sample chamber allows in-situ studies of the change in crystals with temperature, stress, electric or magnetic field. The real time imaging system can provide a direct observation of the dynamic process in the condensed matter system. The arrangement of control system is shown in Figure 1, which is established based on two personal computer and some plug in cards. One computer serves as experimental facility control and data acquisition, while another is used for on-line and off-line X-ray image processing. The every part of this system will be described in following paragraphs.