论文部分内容阅读
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(40~100V)。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4mV,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。
Silicon photomultiplier tube (SiPM) has a wide range of applications in high-energy physics, medical physics and other fields because of its high gain, high time resolution, low operating voltage and magnetic field insensitivity. The design of the system includes front-end electronics and data acquisition system. The front-end electronics board combines 64-channel SiPM with VATA64 and CPLD. The board also integrates a temperature compensation circuit for stabilizing the detector gain and a light-emitting diode (LED) driving circuit for calibrating the gain. The data acquisition system uses a field programmable gate array (FPGA) as the core and can simultaneously read eight front-end electronic boards , And provides programming controllable working voltage (40 ~ 100V) for SiPM. The system has been applied to the prototype design of the electromagnetic energy meter for the PEBS experiment conducted by Switzerland, Germany, the United States and China and achieved good results at the CERN beamline experiment. The high-density, multi-channel SiPM electronics readout system adjusts detector bias on a channel-by-channel basis with 4mV accuracy and less than 2% gain difference for each channel after adjustment. This system can be used as a reference for other SiPM applications in new particle tracing chambers or gauges.