Event vertex and time reconstruction in large volume liquid scintillator detectors

Zi-Yuan Li; Yu-Mei Zhang; Guo-Fu Cao; Zi-Yan Deng; Gui-Hong Huang; Wei-Dong Li; Tao Lin; Liang-Jian Wen; Miao Yu; Jia-Heng Zou; Wu-Ming Luo; Zheng-Yun You

doi:10.1007/s41365-021-00885-z

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Event vertex and time reconstruction in large volume liquid scintillator detectors

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2021-06-04

- Event vertex and time reconstruction in large volume liquid scintillator detectors
- Nuclear Science and Techniques Vol. 32, Issue 5, Article number: 49(2021)
- Affiliations：
  
  1.School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
  2.Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
  3.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  4.School of Physics and Technology, Wuhan University, Wuhan 430072, China
- Author bio：
  
  zhangym26@mail.sysu.edu.cn
  luowm@ihep.ac.cn
  youzhy5@mail.sysu.edu.cn
- Funds：
- DOI：10.1007/s41365-021-00885-z
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Zi-Yuan Li, Yu-Mei Zhang, Guo-Fu Cao, et al. Event vertex and time reconstruction in large volume liquid scintillator detectors. [J]. Nuclear Science and Techniques 32(5):49(2021)
DOI：

Zi-Yuan Li, Yu-Mei Zhang, Guo-Fu Cao, et al. Event vertex and time reconstruction in large volume liquid scintillator detectors. [J]. Nuclear Science and Techniques 32(5):49(2021) DOI： 10.1007/s41365-021-00885-z.

摘要

Abstract

Large-volume liquid scintillator detectors with ultra-low background levels have been widely used to study neutrino physics and search for dark matter. Event vertex and event time are not only useful for event selection but also essential for the reconstruction of event energy. In this study, four event vertex and event time reconstruction algorithms using charge and time information collected by photomultiplier tubes were analyzed comprehensively. The effects of photomultiplier tube properties were also investigated. The results indicate that the transit time spread is the main effect degrading the vertex reconstruction, while the effect of dark noise is limited. In addition, when the event is close to the detector boundary, the charge information provides better performance for vertex reconstruction than the time information.

关键词

Keywords

JUNOLiquid scintillator detectorNeutrino experimentVertex reconstructionTime reconstruction

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