https://doi.org/10.1051/epjconf/202532000009
Design of a LYSO crystal calorimeter for dark photon detection in the DarkSHINE experiment
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
* e-mail: zhiyuzhao@sjtu.edu.cn
** On behalf of DarkSHINE R&D Team
Published online: 7 March 2025
The DarkSHINE experiment aims to detect dark photons, a candidate for light dark matter, using a high-frequency electron beam from the Shanghai High Repetition-Rate XFEL and Extreme Light Facility. The Electromagnetic Calorimeter (ECAL) in DarkSHINE serves to precisely measure the energy of recoil electrons and bremsstrahlung photons. It is a homogeneous calorimeter composed of LYSO crystal scintillators, which was chosen for its fast decay time, high light yield, and strong radiation resistance. Through comprehensive simulations, the ECAL dimensions were optimized to 52.5×52.5×44 cm3, balancing performance and cost. Radiation assessments revealed a maximum dose of 107 rad for LYSO crystals and an equivalent 1 MeV neutron fluence of 1013 for silicon sensors. The optimized ECAL configuration is expected to enhance sensitivity to dark photon signatures by providing precise energy measurements of recoil electrons and bremsstrahlung photons.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
