Design of a LYSO crystal electromagnetic calorimeter for dark photon detection in the DarkSHINE experiment
摘要
This paper presents the design and optimization of a lutetium yttrium oxyorthosilicate(LYSO)crystal electromagnetic calorimeter(ECAL)for the DarkSHINE experiment,which aims to identify 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 configuration consisted of 21×21×11 LYSO crystals,each measuring 2.5 cm×2.5 cm×4 cm,arranged in a staggered layout to enhance 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 scintillation,silicon photomultiplier,and analog-to-digital converter behaviors,providing a realistic representation of the detector's performance.Additionally,the study assessed radiation damage in the ECAL region,emphasizing the importance of using radiation-resistant scintillators and silicon sensors.
基金
supported by National Key R&D Program of China(Nos.2023YFA1606904 and 2023YFA1606900)
National Natural Science Foundation of China(No.12150006)
Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University(No.21TQ1400209)
National Center for High-Level Talent Training in Mathematics,Physics,Chemistry,and Biology。
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