Speaker
Description
The Jiangmen Underground Neutrino Observatory (JUNO) is a large-scale neutrino experiment using a 20-kt liquid scintillator Central Detector surrounded by a 35-kt water Cherenkov veto Detector, and an almost 1000-m2 plastic scintillator Top Tracker. Following the completion of detector commissioning, JUNO began physics data taking on August 26, 2025.
The electronics simulation (ElecSim) is the key component of JUNO’s offline software. It takes the photoelectron information from Geant4-based detector simulation and simulates the response of PhotoMultiplier Tube (PMT), the trigger logic and the readout electronics for all sub-detectors. A “pull” workflow is employed to load and process events only when a readout is required, thereby avoiding excessive memory usage.
Following extensive commissioning efforts, ElecSim has been updated to more accurately reflect JUNO electronics. Realistic PMT response models and sub-detector-specific trigger configurations have been updated and validated using real data. PMT parameters, which are known to change during data taking, are stored as conditions data in the database. The software framework has also been optimized to facilitate integration of additional sub-detector components. Finally, we present the performance of a fast-simulation mode for high-energy events and report computing speed on various data samples.