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Abstract:
Silicon pixel detectors are essential instruments in high-energy physics experiments, widely used for particle tracking and energy measurement. Traditional detectors often employ hybrid pixel technologies, where the sensor layer and readout circuitry are separate. While these systems offer excellent performance, their high cost, thickness, and complex manufacturing processes limit their applicability in future high-radiation environments. To address these challenges, High Voltage CMOS (HV-CMOS) technology has emerged as a promising solution. By integrating both the detection and readout functions into a single silicon chip, HV-CMOS detectors significantly reduce thickness and cost, while offering high resolution and enhanced radiation tolerance.
This talk will present the HV-CMOS particle detectors developed by the speaker, focusing on the latest prototype, RD50-MPW4. This sensor integrates analog amplification and high-speed digital readout circuits (640 Mbps) and incorporates backside biasing to achieve a breakdown voltage of over 600 V, resulting in impressive radiation tolerance up to 3×10¹⁵ neq/cm². Test results show that RD50-MPW4 achieves state-of-the-art performance in terms of spatial resolution, time resolution, and radiation hardness.
About the speaker:
Dr. Chenfan Zhang is a Research Associate at the University of Liverpool’s Department of Physics, where he specializes in the development of radiation-tolerant silicon pixel detectors for high-energy physics. He has been actively involved in designing and testing HV-CMOS-based detectors for large-scale particle physics experiments. Dr. Zhang has contributed to the design of two series of HV-CMOS prototypes: RD50-MPW and UKRI-MPW, developed in collaboration with the CERN RD50 group. His work focuses on improving radiation tolerance and reducing the detector thickness for high-energy physics applications.
He is currently leading the design of the RadPix detector for the CERN-LHCb Mighty Tracker upgrade. His research also has potential applications in radiation monitoring, medical dosimetry, and space science.
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Meeting ID 会议号: 86451225269
Meeting URL 会议链接:: https://us02web.zoom.us/j/86451225269?pwd=lCKVYiHXVwaJqWIy22ww0WOl94a9Hz.1
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