大气与环境光学学报2025，Vol.20Issue(4)：546-558,13.DOI:10.3969/j.issn.1673-6141.2025.04.011
一种冷凝粒子计数器重合计数误差的校正方法
An alternative correction method for coincidence counting error of condensation particle counters
摘要
Abstract
An alternative correction method for coincidence counting error in condensation particle counters(CPCs)is presented in this work.Due to the Poisson process can be used to describe the probability of particle occurrence within a certain period of time during particle counting in CPC,the per-event dead time is found to be varying with the sampling particle number concentration.Therefore,the concentration-dependent dead time can be determined experimentally and parameterized by a second-order exponential function,while parameterization also provides a good estimation of the average dead time of CPC.By using Newton's method based on concentration-dependent dead time,the particle number concentration measured by TSI 3788 water-based CPC is corrected,and an average error of less than 0.2%is achieved for particle concentrations ranging from 3000 to 40000#/cm3.It is shown that Newton's method combined with a concentration-dependent dead time outperforms other methods with fixed dead time,including Lambert W function method and Taylor series expansion method,especially in the low particle concentration range.关键词
单个事件的死区时间/重合校正/牛顿法/针对冷凝粒子计数器Key words
per-event dead time/coincidence correction/Newton's method/condensation particle counter分类
资源环境引用本文复制引用
白雪,桂华侨,赵欣,刘建国,张礁石..一种冷凝粒子计数器重合计数误差的校正方法[J].大气与环境光学学报,2025,20(4):546-558,13.基金项目
国家自然科学基金(U2133212) （U2133212）
