Simulation Software of the JUNO Experiment

TL;DR

This paper details the development of simulation software for the JUNO experiment, addressing challenges in modeling a large-scale liquid scintillator detector for neutrino research.

Contribution

It introduces the JUNO simulation software, highlighting solutions for large-scale optical photon simulation, event correlation, and data processing challenges.

Findings

Supports simulation of millions of optical photons

Enables time-correlated and event-mixed analysis

Addresses large-scale data processing challenges

Abstract

The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose experiment, under construction in southeast China, that is designed to determine the neutrino mass ordering and precisely measure neutrino oscillation parameters. Monte Carlo simulation plays an important role for JUNO detector design, detector commissioning, offline data processing, and physics processing. The JUNO experiment has the world's largest liquid scintillator detector instrumented with many thousands of PMTs. The broad energy range of interest, long lifetime, and the large scale present data processing challenges across all areas. This paper describes the JUNO simulation software, highlighting the challenges of JUNO simulation and solutions to meet these challenges, including such issues as support for time-correlated analysis, event mixing, event correlation and handling the simulation of many millions of optical photons.