HEPS-BPIX, a single photon counting pixel detector with a high frame rate for the HEPS project

China's next generation light source, named the High Energy Photon Source (HEPS), is currently under construction. HEPS-BPIX (HEPS-Beijing PIXel) is a dedicated pixel readout chip that operates in single photon counting mode for X-ray applications in HEPS. Designed using CMOS 0.13 mu m technology, the chip contains a matrix of 104 x 72 pixels. Each pixel measures 150 mu m x 150 mu m and has a counting depth of 20 bits. A bump-bonded prototyping detector module with a 300-mu m thick silicon sensor was tested in the beamline of Beijing Synchrotron Radiation Facility. A fast stream of X-ray images was demonstrated, and a frame rate of 1.2 kHz was proven, with a negligible dead time. The test results showed an equivalent noise charge of 115 e(-) rms after bump bonding and a threshold dispersion of 55 e(-) rms after calibration. (C) 2016 Elsevier B.V. All rights reserved.