Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector

To maximize the light yield of the liquid scintillator (LS) for the Jiangmen Underground Neutrino Observatory (JUNO), a 20 t LS sample was produced in a pilot plant at Daya Bay. The optical properties of the new LS in various compositions were studied by replacing the gadolinium-loaded LS in one ant...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Abusleme, A, Antonelli, V, Antoshkina, T, Baldoncini, M, Brigatti, A, Caruso, R, Chang, J F, Chen, P A, Chimenti, P, Deng, Z, Ding, X F, Ding, Y Y, Dong, J M, Dove, J, Feng, L C, Feng, Q C, d, R, Garfagnini, A, Giammarchi, M, Giuliani, F, Guo, L, Guo, W L, M He, Heng, Y K, Higuera, A, Hor, Y K, Insolia, A, Johnson, R A, Kang, L, Kramer, M, Krasnoperov, A, Kutovskiy, N, Lei, L, Li, D M, F Li, Li, H T, Li, J J, Li, J Q, Li, K J, Li, S C, Li, W D, Li, X M, Li, Z Y, Liang, J J, Ling, J J, Liu, H J, Liu, J C, Liu, R X, Lokhov, A, Lubsandorzhiev, S, Luo, F J, Ma, Q M, Martellini, C, Mayilyan, D, McDonald, K T, Meyhöfer, D, Paoloni, A, Pei, Y T, Peng, J C, Popov, A, Pratumwan, W, Qi, F Z, Ren, B, Rezinko, T, Roth, C, Rujirawat, S, Salamanna, G, Sangka, A, Selyunin, A, Serafini, A, Shi, G, Sisti, M, Slupecki, M, Smirnov, O, Sogo-Bezerra, T, Soonthornthum, B, Sun, S F, Suwonjandee, N, Szelezniak, M, Tang, Q, Tang, X, Volpe, C, Wang, E, Wang, G L, Wang, N Y, Wang, X Y, Watcharangkool, A, Wen, L J, Wiebusch, C, Wu, C H, Xing, Z Z, J Xu, Yan, X B, Yao, H F, M Ye, Yi, P H, You, Z Y, Yu, B X, Yu, X H, Zhuang, H L
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 01.07.2020
Subjects
Composition
Computer simulation
Gadolinium
Mathematical models
Neutrinos
Optical properties
Optimization
Parameters
Photoelectrons
Scintillation counters
Sensors
Solvents
Online AccessGet full text

Cover

More Information
Summary:To maximize the light yield of the liquid scintillator (LS) for the Jiangmen Underground Neutrino Observatory (JUNO), a 20 t LS sample was produced in a pilot plant at Daya Bay. The optical properties of the new LS in various compositions were studied by replacing the gadolinium-loaded LS in one antineutrino detector. The concentrations of the fluor, PPO, and the wavelength shifter, bis-MSB, were increased in 12 steps from 0.5 g/L and <0.01 mg/L to 4 g/L and 13 mg/L, respectively. The numbers of total detected photoelectrons suggest that, with the optically purified solvent, the bis-MSB concentration does not need to be more than 4 mg/L. To bridge the one order of magnitude in the detector size difference between Daya Bay and JUNO, the Daya Bay data were used to tune the parameters of a newly developed optical model. Then, the model and tuned parameters were used in the JUNO simulation. This enabled to determine the optimal composition for the JUNO LS: purified solvent LAB with 2.5 g/L PPO, and 1 to 4 mg/L bis-MSB.
ISSN:2331-8422