HEPS-BPIX2: The hybrid pixel detector upgrade for high energy photon source in China

The High Energy Photon Source (HEPS) is a new research facility currently under construction in Beijing, China. HEPS-BPIX2 is the second prototype of photon counting pixel detector developed at Institute of High Energy Physics (IHEP) to comply with the requirements of the HEPS. It follows the first prototype, HEPS-BPIX, with a pixel size of 150 mu m x 150 mu m and frame rate up to 1.2 kHz at 20-bit dynamic range, but upgrades with transmission control protocol (TCP) hardware stack on 10 Gigabit Ethernet (10 GbE) for large-area multi-modules system. One million-pixel detector with 16 modules, covering an area of 16.32 cm x 18.3 cm, is integrated, and it has demonstrated the basic functionality with X-ray and synchrotron light. The readout system is organized in parallel with groups and in daisy-chain in each group, achieving 23 Gbps data at full 1.2 kHz frame rate.