基于GEANT4的硅-钨取样量能器在缩减与全仪器化配置下探测器响应的比较研究
GEANT4-Based Comparative Study of Detector Response in Reduced and Fully Instrumented Silicon-Tungsten Sampling Calorimeter
AI总结：
本文基于GEANT4模拟比较了缩减与全仪器化硅-钨取样量能器的电磁簇射响应，证明缩减原型能再现簇射发展主要特征，并可通过相关性估算量热性能。
AI中文摘要：
本文介绍了一项基于GEANT4的硅-钨（Si-W）取样量能器模拟研究，旨在探究1–120 GeV能量范围内的电磁簇射发展及探测器响应。研究考虑了两种探测器配置：一种是缩减的序列取样原型（配置I），其中单个硅探测器层放置于逐渐增厚的钨吸收体下游，以采样纵向簇射演化；另一种是全仪器化取样量能器（配置II），由二十个硅层与钨吸收体交错排列组成。探测器响应从纵向簇射发展、簇射最大位置、能量沉积、探测器线性以及量热性能等方面进行研究。配置II提供同步纵向采样，并允许逐事件重建沉积能量，从而得到预期的线性响应和能量分辨率。配置I再现了平均纵向簇射轮廓，并与配置II的积分簇射响应表现出强线性相关性。尽管配置I因缺乏逐事件多层采样而无法直接确定量热能量分辨率，但观察到的两种配置之间的相关性被用于将缩减原型的响应与全仪器化量能器的响应相关联，并估算相应的量热性能。结果表明，缩减原型成功再现了全仪器化探测器中所观测到的电磁簇射发展的主要特征，从而确立了其在完整原型构建受可用资源限制时，用于探测器表征和束流测试研究的实用性。
英文摘要：
{A GEANT4-based simulation study of a silicon--tungsten (Si--W) sampling calorimeter is presented to investigate electromagnetic shower development and detector response in the energy range of 1--120 GeV. Two detector configurations are considered: a reduced sequential-sampling prototype (Configuration-I), where a single silicon detector layer is placed downstream of progressively increasing tungsten absorber depths to sample the longitudinal shower evolution, and a fully instrumented sampling calorimeter (Configuration-II) consisting of twenty silicon layers interleaved with tungsten absorbers. The detector response is studied in terms of longitudinal shower development, shower maximum position, energy deposition, detector linearity, and calorimetric performance. Configuration-II provides simultaneous longitudinal sampling and allows event-by-event reconstruction of the deposited energy, yielding the expected linear response and energy resolution. Configuration-I reproduces the average longitudinal shower profiles and exhibits a strong linear correlation with the integrated shower response of Configuration-II. Although the absence of event-by-event multi-layer sampling prevents a direct determination of calorimetric energy resolution in Configuration-I, the observed correlation between two configurations is used to relate the response of the reduced prototype to that of the fully instrumented calorimeter and to estimate the corresponding calorimetric performance. The results demonstrate that the reduced prototype successfully reproduces the main characteristics of electromagnetic shower development observed in the fully instrumented detector, establishing its usefulness for detector characterization and test-beam studies when the construction of a complete prototype is limited by available resources.
