Fig. 1. Schematic diagram of the structure of the electromagnetic calorimeter

Fig. 2. Electromagnetic calorimeter unit (a) Schematic diagram of Tower structure, (b) Distribution of scintillator layer

Fig. 3. Working principle of electromagnetic calorimeter (a) Module model, (b) Luminescence decay curve, (c) Simplified model of electromagnetic shower, (d) Photon transmission process

Fig. 4. Influence of incident position on module performance (a) Eight different electron incident positions, (b) Influence of incident position on energy deposition, (c) Influence of incident position on energy resolution

Fig. 5. Effect of scintillator layer number on module performance (a) Scintillator layer vs. thickness of lead, (b) Effect of scintillator layer on energy deposition, (c) Effect of scintillator layer on energy resolution

Fig. 6. Material parameters vs. energy resolution (a) Relationship between the number of scintillator layers and energy resolution, (b) Relationship between the thickness of lead and energy resolution

Fig. 7. Time resolution simulation (a) Schematic diagram of the simulation scenario, (b) Time distribution of SiPM detected photoelectrons

Fig. 8. Simulation results of time resolution (a) Effect of scintillator layers on tower time resolution, (b) Effect of incident electron energy on tower time resolution

Fig. 9. Effect of polishing on detector performance (a) Influence of optical fiber end face polishing on the number of photoelectrons detected by SiPM, (b) Influence of optical fiber end face polishing on the time resolution of tower

Fig. 10. Cosmic ray test (a) Simulation scheme for cosmic ray testing, (b) Photoelectric yield, (c) Distribution of time difference between Tower and A, (d) Distribution of time difference between Tower and B, (e) Distribution of time difference between A and B

Fig. 11. Coordinate resolution simulation (a) 7×7 tower combination, (b) Energy deposition distribution of array towers

Fig. 12. Correction of the reconstructed position of the electrons (a) Electronic position reconstruction, (b) Energy deposition distribution around the point of incidence, (c) Reconstruction position error vs. incident position, (d) Calibrated electronically

Fig. 13. Simulation results of coordinate resolution (a) Effect of scintillator layer number on coordinate resolution, (b) Effect of incident electron energy on coordinate resolution