针对中微子探测的多变量分析本底抑制方法
Multivariate analysis background suppression methods for neutrino detection
郭一 1张余炼 2魏志勇2
作者信息
- 1. 南京航空航天大学 航天学院,江苏 南京 211106
- 2. 南京航空航天大学 航天学院,江苏 南京 211106;空间核技术应用与辐射防护工业和信息化部重点实验室,江苏 南京 211106
- 折叠
摘要
为提高中微子探测的本底抑制效果,解决中微子探测器事例重建效率低的问题,本文提出了一种由多个塑料闪烁体单元耦合硅光电倍增管读出的小型阵列中微子探测器方案.基于阵列探测器的多变量分析方法,通过设计并制作小型阵列探测器,对多变量分析方法在中微子探测中对本底的抑制效果进行了研究.搭建了 3×3 的小型阵列探测器,测试了探测器的脉冲形状甄别能力和中子与伽马的不同拓扑结构.结合基于蒙特卡罗方法的计算,分析了阵列探测器多变量分析方法对本底抑制的有效性.结果表明:仿真与实验结果基本一致,多变量分析方法可以有效抑制本底.
Abstract
To improve the background suppression effect of neutrino detection and solve the problem of low event re-construction efficiency in neutrino detectors,this paper proposes a small array neutrino detector scheme composed of multiple plastic scintillator units coupled with silicon photomultiplier readout.The suppression effect of the multi-variate analysis method on the background in neutrino detection was studied using the multivariate analysis method of array detectors by designing and manufacturing small array detectors.A 3×3 small array detector was built,and the pulse shape discrimination capability of the detector and the different topological structures of neutrons and gam-mas were tested.Combined with Monte Carlo simulation-based analysis,the effectiveness of the array detector's multivariate analysis method for background suppression was analyzed.The results show that the simulation and ex-perimental results are consistent,and the multivariate analysis method can effectively suppress background noise.
关键词
中微子探测/本底抑制方法/塑料闪烁体/多变量分析/阵列探测器/脉冲形状甄别/GEANT4/硅光电倍增管/极零相消Key words
neutrino detection/background suppression method/plastic scintillator/multivariate analysis/array detector/pulse shape discrimination/GEANT4/silicon photomultiplier/pole-zero cancellation引用本文复制引用
基金项目
国家自然科学基金青年科学基金(12305201)
中央高校基本科研业务费科研基地创新基金(NJ2023023)
出版年
2023
国家科技期刊平台
NSTL
维普
万方数据