光学精密工程2025，Vol.33Issue(16)：2531-2542,12.DOI:10.37188/OPE.20253316.2531
高压纹波对光电倍增管计数率的影响及补偿方法
Effects of high-voltage ripple on photomultiplier tube count rate and compensation techniques
摘要
Abstract
In the production process of chemical products,when utilizing radiation from a radioactive source to measure the density of a solution by penetrating a pipeline,the count rate output from the photo-multiplier tube is susceptible to degradation due to high-voltage ripple noise.This degradation leads to no-ticeable attenuation in the count rate,thereby reducing the density measurement accuracy.A series of methods were proposed to mitigate the impact of ripple noise on the count rate and compensate for the at-tenuation caused by the ripple.First,based on experimental data under various ripple conditions,a mathe-matical model was established to characterize the relationship between the count rate and high-voltage rip-ple.Analysis of this model revealed that reducing the ripple's amplitude and frequency effectively diminish-es its influence on the count rate.Subsequently,an adaptive Kalman filtering algorithm was employed to suppress the ripple noise.By dynamically adjusting the process and measurement noise parameters,the al-gorithm enabled adaptive compensation of the count rate.Experimental validation was carried out using a 40%ethanol solution,and comparative analysis was performed on the count rate and density measurement results before and after compensation.The results demonstrate that,compared to the uncorrected state,the pulse count loss rate decreased to 3.54%-5.46%after compensation.Furthermore,the maximum deviation between the measured and actual solution density was reduced to 0.019 g/cm3,with overall den-sity measurement accuracy improved by up to 1.51%.关键词
光电倍增管/纹波噪声/计数率/卡尔曼滤波/自适应补偿Key words
photomultiplier tube/ripple noise/count rate/Kalman filtering/adaptive compensation分类
信息技术与安全科学引用本文复制引用
王小鹏,李家隆,许金玉..高压纹波对光电倍增管计数率的影响及补偿方法[J].光学精密工程,2025,33(16):2531-2542,12.基金项目
甘肃省高校产业支撑计划项目(No.2023CYZC-40) （No.2023CYZC-40）
兰州市科技计划项目(No.2023-3-104) （No.2023-3-104）
甘肃省优秀研究生"创新之星"项目(No.2025CXZX-685) （No.2025CXZX-685）
