Design of a LYSO Crystal Electromagnetic Calorimeter for DarkSHINE Experiment

Zhiyu Zhao; Qibin Liu; Jiyuan Chen; Jing Chen; Junfeng Chen; Xiang Chen; Changbo Fu; Jun Guo; Kim Siang Khaw; Liang Li; Shu Li; Danning Liu; Kun Liu; Siyuan Song; Tong Sun; Jiannan Tang; Yufeng Wang; Zhen Wang; Weihao Wu; Haijun Yang; Yuming Lin; Rui Yuan; Yulei Zhang; Yunlong Zhang; Baihong Zhou; Xuliang Zhu; Yifan Zhu

arXiv · 2407.17800

Design of a LYSO Crystal Electromagnetic Calorimeter for DarkSHINE Experiment

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Abstract

This paper presents the design and optimization of a LYSO crystal electromagnetic calorimeter (ECAL) for the DarkSHINE experiment, which aims to search for dark photons as potential mediators of dark forces. The ECAL design was evaluated through comprehensive simulations, focusing on optimizing dimensions, material selection, energy distribution, and energy resolution. The ECAL configuration consists of 21$\times$21$\times$11 LYSO crystals, each measuring 2.5$\times$2.5$\times$4 cm$^3$, arranged in a staggered layout to improve signal detection efficiency. A 4 GeV energy dynamic range was established to ensure accurate energy measurements without saturation, which is essential for background rejection and signal identification. A detailed digitization model was developed to simulate the scintillation, SiPM, and ADC behaviors, providing a more realistic representation of detector performance. Additionally, the study assessed radiation damage in the ECAL region, highlighting the necessity of radiation-resistant scintillators and silicon sensors.

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Zhiyu Zhao, Qibin Liu, Jiyuan Chen, Jing Chen, Junfeng Chen, Xiang Chen, Changbo Fu, Jun Guo, Kim Siang Khaw, Liang Li, Shu Li, Danning Liu, Kun Liu, Siyuan Song, Tong Sun, Jiannan Tang, Yufeng Wang, Zhen Wang, Weihao Wu, Haijun Yang, Yuming Lin, Rui Yuan, Yulei Zhang, Yunlong Zhang, Baihong Zhou, Xuliang Zhu, Yifan Zhu. 2024-07-25. Design of a LYSO Crystal Electromagnetic Calorimeter for DarkSHINE Experiment. https://arxiv.org/abs/2407.17800

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