Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector
Journal Article
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· Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
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- Pontificia Universidad Católica de Chile, Santiago (Chile)
- National Centre for Scientific Research (CNRS), Strasbourg (France). Hubert Curien Multidisciplinary Inst. (IPHC)
- Pakistan Institute of Nuclear Science and Technology, Islamabad (Pakistan)
- INFN Catania and Dipartimento di Fisica e Astronomia dell Universita di Catania, Catania (Italy); National Inst. of Nuclear Physics (INFN), Catania (Italy)
- East China University of Science and Technology, Shanghai (China)
- Institute of High Energy Physics, Beijing (China)
- University of Science and Technology of China, Hefei (China)
- Joint Institute for Nuclear Research, Dubna (Russia)
- Chulalongkorn University, Department of Physics, Faculty of Science, Bangkok (Thailand)
- Comenius University Bratislava, Faculty of Mathematics, Physics and Informatics, Bratislava (Slovakia)
- Univ. of Wisconsin, Madison, WI (United States)
- University of Ferrara and INFN Sezione di Ferrara, Department of Physics and Earth Science, Ferrara (Italy)
- Yale Univ., New Haven, CT (United States). Wright Laboratory and Department of Physics
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. In order 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. Overall, 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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- JUNO Collaboration
- Grant/Contract Number:
- AC02-05CH11231; SC0012704
- OSTI ID:
- 1716746
- Alternate ID(s):
- OSTI ID: 1810999
OSTI ID: 1812346
- Report Number(s):
- BNL--220606-2020-JAAM
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 988; ISSN 0168-9002
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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