论文标题
新电磁抽样量热计的角度分辨率的模拟
Simulation of angular resolution of a new electromagnetic sampling calorimeter
论文作者
论文摘要
我们报告了电磁（EM）采样量热计的仿真结果，其光子在100〜MEV至2〜GEV范围内。 EM量热计的仿真模型由1毫米厚的铅板和5毫米厚的塑料闪烁板的交替层组成。闪烁板交替分割成水平和垂直条。在这项研究中，我们使用Geant4模拟在单个条中获得能量沉积物，并使用XGBoost和梯度提高决策树重建入射光子角。角度重建的性能取决于检测器的配置和机器学习的准确性。角度分辨率由$ 0.24^{\ circ} \ oplus 1.25^{\ circ}/\ sqrt {e_γ} $很好地描述，其中$e_γ$是GEV的入射光子能量，用于15 mm和32层的条纹。对于在10 $^{\ circ} $到40 $^{\ circ} $的不同事件角度的不同事件角度的依赖性是一致的。
We report on the simulation results for the angular resolution of an electromagnetic (EM) sampling calorimeter with photons in the range of 100~MeV to 2~GeV. The simulation model of the EM calorimeter consists of alternating layers of a 1-mm-thick lead plate and a 5-mm-thick plastic scintillator plate. The scintillator plates are alternately segmented into horizontal and vertical strips. In this study, we obtain energy deposits in individual strips using Geant4 simulations and reconstruct the incident photon angles using XGBoost with gradient-boosted decision trees. The performance of the angle reconstruction depends on the detector configuration and the accuracy of machine learning. The angular resolution is well described by the expression $0.24^{\circ} \oplus 1.25^{\circ}/\sqrt{E_γ}$, where $E_γ$ is the incident photon energy in GeV, for strips of 15 mm and 32 layers. This energy dependence is consistent for different incident angles in the range of 10$^{\circ}$ to 40$^{\circ}$.
