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Description
The CoRDIA detector (Continuous Readout Digitising Imager Array) is an X-ray imager being developed for scientific experiments at diffraction-limited synchrotron rings.
It is designed to be capable of continuous operation at 150 kframe/s and features a compact pixel size (110x110 μm^2), that includes digitisation and fast data streamout circuits within the pixel array, so that they do not form blind areas [1].
The detector aims at being capable of single-photon discrimination capability at 12 keV, but is compatible with high-Z sensors for higher energy photons.
A charge-integrating, adaptive-gain circuit is used to extend its dynamic range to 1.75 kphoton/pixel/frame (~160 Mcount/pixel/s), and could be extended further in case of experiments having constant flux condition. It uses a pipelined architecture to achieve continuous Writing-Reading at the target rate.
Several test structure have been designed and tested to confirm expected performances in terms of response at the operational speed.
A larger (~20 kpixel) layout has been designed and is expected to be manufactured this year.
[1] A. Marras et al, 2024 JINST 19 C03006
The authors would like to acknowledge:
NIKHEF, for allowing to include a version of the PCS-GWT circuit in the CoRDIA design;
CERN, for allowing the reuse of CMOS IO pads and SOFIC ESD structures in the design;
Europractice, IMEC and CERN for their MPW and design tool support;
STFC, for the collaboration and cooperation.