CITIUS: a 17400 frames/s X-ray imaging detector with a linear response of up to 945 Mcps/pixel

Abstract:

We report our recent progress in the CITIUS (Charge Integration Type Imaging Unit with high-Speed extended-dynamic-range) detector. It has been developed to overcome the count rate limitation of the current state-of-the-art photon counting detector by introducing novel integrating-type pixels with a size of 72.6 micrometers and a high frame rate of 17.4 kfps [1]. Recently we succeeded in experimentally demonstrating its detecting capability of 945 Mcps/pixel (18 Tcps/cm2) at 10 keV while keeping its single photon sensitivity. In this talk, we report our development status including the performance evaluation and the on-the-fly data processing with FPGAs. A feasibility study of Bragg CDI was carried out at ESRF last year. At SPring-8, applications of these detector systems to XPCS, ptychography, SAXS & WAXS, X-ray beam monitors by using spectro-imaging capability, and fluorescence yield XAFS by using large-area high-count-rate energy resolving detection are in progress. The status of these applications is also reported.

Table I Specifications of CITIUS variant for Synchrotron radiation experiments

(*) 30 Mcps with standard operation. 600 Mcps in an extended mode

References
[1]    SPring-8 II Conceptual Design Report, RIKEN SPring-8 Center, 2014.