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

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• 作者：Wei Wei^a ; ^b ; ^{weiw@ihep.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Jie Zhang^a ; ^b ; Zhe Ning^a ; ^b ; Yunpeng Lu^a ; ^b ; Lei Fan^a ; ^b ; Huaishen Li^a ; ^b ; Xiaoshan Jiang^a ; ^b ; Allan K. Lan^a ; ^b ; Qun Ouyang^a ; ^b ; Zheng Wang^a ; ^b ; Kejun Zhu^a ; ^b ; Yuanbo Chen^a ; ^b ; Peng Liu^a
• 关键词：Pixel detector ; Single photon counting ; High frame rate ; Synchrotron radiation ; X-ray imaging ; HEPS
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 November 2016
• 年：2016
• 卷：835
• 期：Complete
• 页码：169-176
• 全文大小：6861 K

文摘

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 µm technology, the chip contains a matrix of 104×72 pixels. Each pixel measures 150 µm×150 µm and has a counting depth of 20 bits. A bump-bonded prototyping detector module with a 300-µm 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.