Development of Specialized Integrated Circuits for Coordinate X-Ray Detectors

X-ray one-coordinate detectors of photon counting and integrating types based on semiconductor microstrip sensors are developed in the Budker Institute of Nuclear Physics (BINP SB RAS) for the dynamic experiments at the synchrotron radiation facility SKIF. The photon counting detector SciCODE register signal from each photon absorbed in the detector sensitive volume and exceeding the set threshold. In integrating detector DIMEX-Si, the total signal from a large flux of photons that hit the detector in a short frame time is registered. To achieve a spatial resolution of better than 100 µm in a wide range of photon energies and high output data rate a specialized integrated circuits are necessary for signal detection and recording. Based on the results of the development and testing of prototypes of integrated circuits for counting and integrating detectors, full-scale ASICs SciCODE64 for counting and DMXS64A for integrating detectors were developed. Both ASICs contain 64 independent registration channels. SciCODE64 allows to work with a range of recorded energies from 3 to 40 keV at a rate up to 1 MHz. DMXS64A is designed to reach dynamic range of about 1000, maximum photon flux of 10 ⁵ photons per frame (30 keV) and frame rate of 50 MHz.