Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector
Langue
en
Article de revue
Ce document a été publié dans
Nucl.Instrum.Meth.A. 2021, vol. 988, p. 164823
Résumé en anglais
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 ...Lire la suite >
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 <math display="inline" id="d1e9579" altimg="si26.svg"><mo><</mo></math>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.< Réduire
Mots clés en anglais
Neutrino
Liquid scintillator
Light yield
scintillation counter: liquid
antineutrino: detector
model: optical
JUNO
Daya Bay
wavelength shifter
photon: yield
organic compounds: admixture
fluorine: admixture
Origine
Importé de halUnités de recherche
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