BESⅢ端盖TOF本征时间分辨的MC模拟  

Monte Carlo Simulation of BES Ⅲ End-Cap TOF

作　　者：李昕[1] 吴冲[1] 安少辉[1] 唐泽波[1] 陈宏芳[1] 李澄[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230026

出　　处：《高能物理与核物理》2005年第6期586-591,共6页High Energy Physics and Nuclear Physics

摘　　要：BESⅢ飞行时间探测器(端盖部分)由2×48个塑料闪烁探测器模块构成.采用MonteCarlo模拟软件包Geant4,对该探测器测量高能带电粒子的性能进行了模拟研究.文章讨论了最小电离粒子击中闪烁体不同位置,以及闪烁体形状,闪烁体表面覆盖材料对本征时间分辨的影响,给出了详细的模拟结果,并与宇宙线测试结果进行了比较.为该探测器研制和工程设计提供必要的参考数据.The End-Cap TOF (ETOF)of Beijing Spectromete r( BES Ⅲ) consists of 2×48 pieces of trapezoidal scintillator (BC408). Its main physics goal is to realize the 2σ π/k separation at momentum up to 1GeV/c, and to obtain TOF intrinsic time resolution of 80ps. In order to study the effects of several factors on the intrinsic time resolution of ETOF, the Monte Carlo simulation of the detector is carried out by using Geant4 software package. The performance of ETOF at different conditions, such as scintillator covered materials, shapes, and particle hit positions, is simulated and discussed in detail. The result can provide a reference for the design of ETOF detector in BES Ⅲ.

关 键 词：BESⅢ 飞行时间谱仪 闪烁体探测器 本征时间分辨 发光衰减 

分 类 号：TL812[核科学技术—核技术及应用]