测试科学与仪器2024，Vol.15Issue(2)：244-252,9.DOI:10.62756/jmsi.1674-8042.2024025
光电倍增管计数温漂自适应补偿方法
Adaptive compensation method for photomultiplier tube counting temperature drift
摘要
Abstract
The photomultiplier tube (PMT) is an important device for micro-light detection,and the detection of light intensity using photon counting method can significantly reduce the interference of noise,but the sensitivity,gain,and dark noise of PMT cathode are easily affected by the ambient temperature,which leads to the instability of the output pulse amplitude and affects the detection performance of the system for micro-light. A high voltage gain compensation and threshold correction system was designed for PMT through microcontroller unit (MCU),digital to analog converter (DAC),and other modules. A hybrid function model of temperature and high voltage compensation increment Vh and threshold compensation increment Vt was constructed by analyzing the cathode saturation current,sensitivity,and dark noise of PMT at different temperatures. And the compensation increment hybrid model was used to compensate the PMT counts output for adaptive temperature drift compensation. Experiments using this method with Hamamatsu's end-window PMT CR135 demonstrated that this system had a good output signal-to-noise ratio for large temperature variations,with an average count rate improvement of 0.19 at −20 ℃. Even though a small amount of dark noise was introduced,the detection performance was substantially improved.关键词
光电倍增管/自适应温漂补偿/补偿增量混合模型/阴极灵敏度Key words
photomultiplier tube (PMT)/adaptive temperature drift compensation/compensated incremental hybrid model/cathode sensitivity引用本文复制引用
李岗,王耀琦,王小鹏..光电倍增管计数温漂自适应补偿方法[J].测试科学与仪器,2024,15(2):244-252,9.基金项目
This work was supported by Gansu Province Higher Education Industry Support Plan Project(No.2023CYZC-40) （No.2023CYZC-40）
Lanzhou Science and Technology Development Plan Project(No.2023-3-104). （No.2023-3-104）
