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清华大学学报(自然科学版)  2014, Vol. 54 Issue (6): 695-699    
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针对SiPM探测器的多通道读出电子学设计
韩晓雪,曾鸣(),龚光华,程建平,邵贝贝
Multi-channel SiPM readout system
Xiaoxue HAN,Ming ZENG(),Guanghua GONG,Jianping CHENG,Beibei SHAO
Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
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摘要 

硅光电倍增管(SiPM)由于其高增益、高时间分辨、低工作电压、磁场不敏感等优点,在高能物理、医学物理等领域具有广泛的应用前景。该文设计的系统包含前端电子学和数据采集系统两部分: 前端电子学板结合商用专用集成电路(ASIC)(VATA64)与复杂可编程逻辑器件(CPLD), 能够同时读出64通道的SiPM, 板上同时集成了稳定探测器增益的温度补偿电路和标定增益的发光二极管(LED)驱动电路; 数据采集系统以现场可编程门阵列(FPGA)为核心,可以同时读出8块前端电子学板,并为SiPM提供编程可控的工作电压(40~100 V)。该系统已经应用于由瑞士、德国、美国和中国合作的正负电子气球谱仪(PEBS)实验的电磁量能器原型设计,并在欧洲核子中心(CERN)束线实验取得了良好的结果。该高密度多通道SiPM电子学读出系统可以逐通道调节探测器偏压,调节精度达4 mV, 调节后各通道增益的差异可小于2%。该系统对于其他SiPM在新型粒子径迹室或量能器的应用具备借鉴意义。

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关键词 硅光电倍增管(SiPM)读出电子学多通道    
Abstract

Silicon photomultipliers (SiPMs) are widely used in both high energy physics and medical physics due to their high gain, excellent timing resolution, low operating voltage and insensitivity to magnetic fields. This paper presents a system containing a 64 channel frontend electronics package integrated with a temperature compensation circuit and a light emitting diode (LED) driver circuit for gain stabilization and calibration. The system also has a field-programmable gate array (FPGA) programmed data acquisition system which can simultaneously read 8 frontend cards and provide a programmable high voltage (40-100 V) for the SiPMs. The system has been used in the electromagnetic calorimeter (ECAL) of the positron electron balloon spectrometer (PEBS), a collaboration between Switzerland, Germany, the USA and China with good results in a beam test at the European Organisation for Nuclear Research (CERN). The high-density, multi-channel SiPM readout system can adjust the detector operating voltage on each specific channel with a precision of up to 4 mV and the gain variance is less than 2% after adjustments. This system provides efficient utilization of SiPM in particle-track detectors and calorimeters.

Key wordssilicon photomultiplier (SiPM)    readout system    multi-channel
收稿日期: 2013-02-28      出版日期: 2014-06-15
引用本文:   
韩晓雪,曾鸣,龚光华,程建平,邵贝贝. 针对SiPM探测器的多通道读出电子学设计[J]. 清华大学学报(自然科学版), 2014, 54(6): 695-699.
Xiaoxue HAN,Ming ZENG,Guanghua GONG,Jianping CHENG,Beibei SHAO. Multi-channel SiPM readout system. Journal of Tsinghua University(Science and Technology), 2014, 54(6): 695-699.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2014/V54/I6/695
  SiPM多通道读出电子学系统整体结构图
  前端电子学板功能结构图
  VATA64芯片手册给出的多通道读出时序图[10]
  数据读出板结构图
  电子学系统整体噪声水平测试(无探测器连接时的测量结果)
  电子学系统整体噪声水平测试(连接探测器时的测量结果)
  将电子学系统置于暗箱中进行光强扫描测试得到的单光子能谱
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