Design of a LYSO crystal electromagnetic calorimeter for dark photon detection in the DarkSHINE experiment  

作　　者：Zhi-Yu Zhao Qi-Bin Liu Ji-Yuan Chen Jing Chen Jun-Feng Chen Xiang Chen Chang-Bo Fu Jun Guo Kim Siang Khaw Liang Li Shu Li Dan-Ning Liu Kun Liu Si-Yuan Song Tong Sun Jian-Nan Tang Yu-Feng Wang Zhen Wang Wei-Hao Wu Hai-Jun Yang Yu-Ming Lin Rui Yuan Yu-Lei Zhang Yun-Long Zhang Bai-Hong Zhou Xu-Liang Zhu Yi-Fan Zhu 

机构地区：[1]Tsung-Dao Lee Institute,Shanghai Jiao Tong University,1 Lisuo Road,Shanghai 201210,China [2]Institute of Nuclear and Particle Physics,School of Physics and Astronomy,800 Dongchuan Road,Shanghai 200240,China [3]Key Laboratory for Particle Astrophysics and Cosmology(MOE),Shanghai Key Laboratory for Particle Physics and Cosmology(SKLPPC),Shanghai Jiao Tong University,800 Dongchuan Road,Shanghai 200240,China [4]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [5]Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China [6]Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Fudan University,Shanghai 200443,China [7]Institute of Modern Physics,Fudan University,Shanghai 200443,China [8]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China [9]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Nuclear Science and Techniques》2025年第3期69-84,共16页核技术(英文)

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。

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.

关 键 词：Electromagnetic calorimeter LYSO Scintillator detector Light dark matter Dark photon 

分 类 号：O57[理学—粒子物理与原子核物理]