论文标题
CEPC基于CEPC闪烁体的电磁热量表的SIPM动态范围
SiPM Dynamic Range for CEPC Scintillator-based Electromagnetic Calorimeter
论文作者
论文摘要
用硅光电塑料（SIPMS）是圆形电子磁盘（ECAL）候选圆形电子磁盘（ECAL）候选的Ahigh颗粒状闪光计量读数（sipms）。该ECAL候选者的关键设计参数是SIPM的动态范围。这项研究研究了CEPC闪烁体ECAL所需的SIPM动态范围。基于SIPM的操作原理开发模型，以描述SIPM在一个恢复期内对脉冲的响应，通过考虑交叉对话效果，光子检测效率和像素数量。该模型预测的10000像素SIPM的响应曲线与高达12000个光子的入射光脉冲在2％以内的测量曲线一致。 SIPM响应的固有波动自然存在于该模型中，并研究了SIPM响应中饱和效应的校正。 Monte Carlo（MC）模拟表明，该算法可以恢复SIPM的响应线性，其中光子数量的数量是SIPM像素数的六倍。实施了模型和校正程序，以完全模拟ZH生产Z-> VV，H-> yy通道，以评估CEPC闪烁体ECAL对重建的HIGGS玻色子质量的SIPM动态范围以及该通道中HIGGS信号的敏感性。结果表明，配备了不少于4000个SIPM像素的CEPC闪烁体ECAL，每个通道的光收益率为20个光子电源，用于单个最小电离粒子，可以满足CEPC中Di-Photon通道中HIGGS Boson Precision测量的要求。
Ahigh-granularity scintillator calorimeter readout with silicon photomultipliers (SiPMs) is an electromagnetic calorimeter (ECAL) candidate for experiments at the Circular Electron Positron Collider (CEPC). A critical design parameter of this ECAL candidate is the dynamic range of the SiPMs. This study investigates the SiPM dynamic range required for the CEPC scintillator ECAL. A model is developed on the basis of the operation principles of SiPMs to describe the response of an SiPM to light pulses within one recovery period by considering the cross-talk effect, photon detection efficiency, and number of pixels. The response curve of a 10000-pixel SiPM predicted by the model is consistent with the measured curve within 2% for an incident light pulse of up to 12000 photons. The intrinsic fluctuations of the SiPM response naturally exist in this model, and the correction of the saturation effect in the SiPM response is investigated. Monte Carlo (MC) simulation shows that the algorithm can restore the response linearity of an SiPM for an incident light pulse in which the number of photons is up to around six times the number of SiPM pixels. The model and correction program are implemented for full simulation of the ZH production Z->vv, H->yy channel to evaluate the impact of the SiPM dynamic range of the CEPC scintillator ECAL on the reconstructed Higgs boson mass and the sensitivity to the Higgs signal in this channel. The results show that the CEPC scintillator ECAL equipped with no less than 4000 SiPM pixels and operated with a light yield of 20 photon-electrons per channel for a single minimum ionizing particle can meet the requirements for Higgs boson precision measurement in the di-photon channel at the CEPC.
