Fast muon simulation in the JUNO central detector

The Jiangmen Underground Neutrino Observatory （JUNO） is a multi-purpose neutrino experiment designed to measure the neutrino mass hierarchy using a central detector （CD）, which contains 20 kton liquid scintillator （LS） surrounded by about 17000 photomultiplier tubes （PMTs）. Due to the large fiducial...

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Published inChinese physics C Vol. 40; no. 8; pp. 110 - 114
Main Author 林韬 邓子艳 李卫东 曹国富 尤郑昀 李新颖
Format Journal Article
LanguageEnglish
Published 01.08.2016
Subjects
Computer simulation
Detectors
Geant4
Muons
Neutrinos
Optical data processing
Propagation
Run time (computers)
中微子
光电倍增管
快子
快速模拟
探测器
液体闪烁体
闪烁光子
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/40/8/086201

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Summary:The Jiangmen Underground Neutrino Observatory （JUNO） is a multi-purpose neutrino experiment designed to measure the neutrino mass hierarchy using a central detector （CD）, which contains 20 kton liquid scintillator （LS） surrounded by about 17000 photomultiplier tubes （PMTs）. Due to the large fiducial volume and huge number of PMTs, the simulation of a muon particle passing through the CD with the Geant4 toolkit becomes an extremely computation-intensive task. This paper presents a fast simulation implementation using a so-called voxel method： for scintillation photons generated in a certain LS voxel, the PMT＇s response is produced beforehand with Geant4 and then introduced into the simulation at runtime. This parameterisation method successfully speeds up the most CPU consuming process, the optical photon＇s propagation in the LS, by a factor of 50. In the paper, the comparison of physics performance between fast and full simulation is also given.
Bibliography:JUNO, central detector, fast simulation, Geant4
11-5641/O4
Tao Lin, Zi-Yan Deng,Wei-Dong Li, Guo-Fu Cao, Zheng-Yun You,Xin-Ying Li（1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2 School of Physics, Sun Yat-sen University, Guangzhou 510275, China 3 School of Physics, Nankai University, Tianjin 300071, China）
The Jiangmen Underground Neutrino Observatory （JUNO） is a multi-purpose neutrino experiment designed to measure the neutrino mass hierarchy using a central detector （CD）, which contains 20 kton liquid scintillator （LS） surrounded by about 17000 photomultiplier tubes （PMTs）. Due to the large fiducial volume and huge number of PMTs, the simulation of a muon particle passing through the CD with the Geant4 toolkit becomes an extremely computation-intensive task. This paper presents a fast simulation implementation using a so-called voxel method： for scintillation photons generated in a certain LS voxel, the PMT＇s response is produced beforehand with Geant4 and then introduced into the simulation at runtime. This parameterisation method successfully speeds up the most CPU consuming process, the optical photon＇s propagation in the LS, by a factor of 50. In the paper, the comparison of physics performance between fast and full simulation is also given.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/40/8/086201