Calibration strategy of the JUNO-TAO experiment
/ Authors
Hangkun Xu, A. Abusleme, N. Anfimov, S. Callier, A. Campeny, Guofu Cao, Jun Cao, C. Cerna, Yu Chen, A. Chepurnov
and 60 more authors
Yayun Ding, F. Druillole, A. Fabbri, Zhengyong Fei, M. Gromov, Miao-fu He, Wei He, Yuan He, Joseph yk Hor, Shaojing Hou, Jianrun Hu, Jun Hu, C. Huss, X. Ji, Tao Jiang, Xiaoshan Jiang, C'ecile Jolliet, Daozheng Li, Min Li, Ruhui Li, Yichen Li, Caimei Liu, Mengchao Liu, Yunzhe Liu, C. Lombardo, S. C. D. Lorenzo, P. Lu, G. Luo, M. MariStefano, Xiaoyan Ma, P. Montini, J. Ochoa-Ricoux, Y. Pei, F. Perrot, F. Petrucci, X. Qian, A. Rebii, Bedvrich Roskovec, A. Rybnikov, H. Steiger, Xilei Sun, P. Walker, Derun Wang, Meifen Wang, Wei Wang, Zhimin Wang, Diru Wu, Xi Xiao, Yu-guang Xie, Zhangquan Xie, Wenqi Yan, Huan Yang, H. Yao, Mei Ye, C. Yuan, Kirill Zamogilnyi, L. Zhan, Jie-Yu Zhang, Shuihan Zhang, R. Zhao
/ Abstract
The Taishan Antineutrino Observatory (TAO or JUNO-TAO) is a satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO). Located near a reactor of the Taishan Nuclear Power Plant, TAO will measure the reactor antineutrino energy spectrum with an unprecedented energy resolution of <2%\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$<2\%$$\end{document} at 1 MeV. Energy calibration is critical to achieve such a high energy resolution. Using the Automated Calibration Unit (ACU) and the Cable Loop System (CLS), multiple radioactive sources are deployed to various positions in the TAO detector for energy calibration. The residual non-uniformity can be controlled within 0.2%. The energy resolution degradation and energy bias caused by the residual non-uniformity can be controlled within 0.05% and 0.3%, respectively. The uncertainty of the non-linear energy response can be controlled within 0.6% with the radioactive sources of various energies, and could be further improved with cosmogenic 12B\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{12}{\textrm{B}}$$\end{document} which is produced by the interaction of cosmic muon in the liquid scintillator. The stability of other detector parameters, e.g., the gain of each Silicon Photo-multiplier, will be monitored with an ultraviolet LED calibration system.
Journal: The European Physical Journal C