用于大面积MRPC探测器的高粒度、高精度定时读出电子学系统的研发
Development of a high-granularity, high-precision timing readout electronics system for large-area MRPC detectors
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中文总结 AI 辅助
本研究针对含2400个2*2 cm pad通道的大面积MRPC探测器，研发了由FEBs、时钟模块、DAQ聚合器及PETIROC2B ASIC组成的高粒度高精度定时读出系统，其单通道时间分辨率达33 ps RMS，可应用于多种定时探测器场景。
中文摘要 AI 辅助
多间隙 resistive plate chamber（MRPC，阻性板室）探测器具备优异的时间分辨率和探测效率，因此对高精度、高可扩展性的定时读出系统存在强烈需求。本研究针对面积为100*100 cm、包含2400个2*2 cm高粒度 pad（ pads， pads ）通道的大面积MRPC探测器设计了一套读出电子学系统。该系统由两块前端板（FEBs）、一个中央时钟分配模块和一个后端DAQ数据采集聚合器组成。每块FEB配备40个32通道的PETIROC2B专用集成电路（ASIC），直接安装在感应 pad 后方。自动化S曲线校准程序可均衡所有2400个通道的基线离散度，将基线电压分布的半高全宽（FWHM）从50 mV降至12 mV，并建立统一的触发阈值。信号注入测量证实，该系统的单通道固有电子学时间分辨率为33 ps 均方根（RMS），芯片间和板间时间分辨率分别为43 ps RMS和45 ps RMS。这套高粒度、高精度定时读出系统可广泛应用于飞行时间（Time-of-Flight）系统、宇宙射线缪子成像以及其他快定时探测器系统。
英文摘要
Multi-gap Resistive Plate Chamber (MRPC) detectors offer excellent time resolution and detection efficiency, creating a strong demand for high-precision, highly scalable timing readout systems. In this work, a readout electronics system is designed for a large-area 100*100 cm MRPC detector containing 2400 high-granularity 2*2 cm pad channels. The system consists of two Front-End Boards (FEBs), a central clock distribution module, and a back-end DAQ aggregator. Each FEB is equipped with 40 32-channel PETIROC2B ASICs mounted directly behind the sensing pads. An automated S-curve calibration procedure equalizes the baseline dispersion across all 2400 channels, reducing the FWHM of the baseline voltage distribution from 50 mV to 12 mV and establishing a uniform triggering threshold. Signal-injection measurements confirm an intrinsic single-channel electronic time resolution of 33 ps RMS, alongside inter-chip and inter-board time resolutions of 43 ps RMS and 45 ps RMS, respectively. This high-granularity, high-precision timing readout system can be widely applied to Time-of-Flight systems, cosmic-ray muon imaging, as well as other fast-timing detector systems.
