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

Abusleme, A. and Adam, T. and Ahmad, S. and Aiello, S. and Akram, M. and Ali, N. and An, F. P. and An, G. P. and An, Q. and Andronico, G. and Anfimov, N. and Antonelli, V. and Antoshkina, T. and Asavapibhop, B. and de André, J. P. A. M. and Babic, A. and Balantekin, A.B. and Baldini, W. and Baldoncini, M. and Band, H. R. and Barresi, A. and Baussan, E. and Bellato, M. and Bernieri, E. and Biare, D. and Birkenfeld, T. and Bishai, M. and Blin, S. and Blum, D. and Blyth, S. and Bordereau, C. and Brigatti, A. and Brugnera, R. and Budano, A. and Burgbacher, P. and Buscemi, M. and Bussino, S. and Busto, J. and Butorov, I. and Cabrera, A. and Cai, H. and Cai, X. and Cai, Y. K. and Cai, Z. Y. and Cammi, A. and Campeny, A. and Cao, C. Y. and Cao, G. F. and Cao, J. and Caruso, R. and Cerna, C. and Chakaberia, I. and Chang, J. F. and Chang, Y. and Chen, H. S. and Chen, P. A. and Chen, P. P. and Chen, S. M. and Chen, S. J. and Chen, X. R. and Chen, Y. W. and Chen, Y. 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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.

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Wen, L. J.0000-0003-4541-9422
Additional Information:© 2020 Elsevier B.V. Received 24 July 2020, Revised 13 October 2020, Accepted 27 October 2020, Available online 6 November 2020. We are grateful for the ongoing cooperation from the China General Nuclear Power Group and China Light and Power Company. Daya Bay is supported in part by the Ministry of Science and Technology of China, the U.S. Department of Energy, the Chinese Academy of Sciences, the CAS Center for Excellence in Particle Physics, the National Natural Science Foundation of China, the Guangdong provincial government, the Shenzhen municipal government, the China General Nuclear Power Group, the Research Grants Council of the Hong Kong Special Administrative Region of China, the MOE in Taiwan, the U.S. National Science Foundation, the Ministry of Education, Youth, and Sports of the Czech Republic, the Charles University Research Centre UNCE, the Joint Institute of Nuclear Research in Dubna, Russia, the National Commission of Scientific and Technological Research of Chile, We acknowledge Yellow River Engineering Consulting Co., Ltd., and China Railway 15th Bureau Group Co., Ltd., for building the underground laboratory. JUNO is supported by the Chinese Academy of Sciences, the National Key R&D Program of China, the CAS Center for Excellence in Particle Physics, the Joint Large-Scale Scientific Facility Funds of the NSFC and CAS, Wuyi University, and the Tsung-Dao Lee Institute of Shanghai Jiao Tong University in China, the Institut National de Physique Nucléaire et de Physique de Particules (IN2P3) in France, the Istituto Nazionale di Fisica Nucleare (INFN) in Italy, the Fond de la Recherche Scientifique (F.R.S-FNRS) and FWO under the “Excellence of Science C EOS in Belgium”, the Conselho Nacional de Desenvolvimento Científico e Tecnològico in Brazil, the Agencia Nacional de Investigación y Desarrollo in Chile, the Charles University Research Centre and the Ministry of Education, Youth, and Sports in Czech Republic, the Deutsche Forschungsgemeinschaft (DFG), the Helmholtz Association, and the Cluster of Excellence PRISMA+ in Germany, the Joint Institute of Nuclear Research (JINR), Lomonosov Moscow State University, and Russian Foundation for Basic Research (RFBR) in Russia, the MOST and MOE in Taiwan, the Chulalongkorn University and Suranaree University of Technology in Thailand , and the University of California at Irvine in USA. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
Ministry of Science and Technology (Taipei)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
Guangdong Provincial GovernmentUNSPECIFIED
Shenzhen Municipal GovernmentUNSPECIFIED
China General Nuclear Power GroupUNSPECIFIED
Research Grants Council of the Hong Kong Special Administrative Region of ChinaUNSPECIFIED
Ministry of Education (Taipei)UNSPECIFIED
Ministry of Education, Youth and Sports (Czech Republic)UNSPECIFIED
Charles UniversityUNSPECIFIED
Joint Institute of Nuclear Research (Dubna)UNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
National Key Research and Development Program of ChinaUNSPECIFIED
Wuyi UniversityUNSPECIFIED
Shanghai Jiao Tong UniversityUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Fonds Wetenschappelijk Onderzoek (FWO)UNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Agencia Nacional de Investigación y Desarrollo (ANID)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)UNSPECIFIED
Lomonosov Moscow State UniversityUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Chulalongkorn UniversityUNSPECIFIED
Suranaree University of TechnologyUNSPECIFIED
University of California, IrvineUNSPECIFIED
Subject Keywords:Neutrino; Liquid scintillator; Light yield
Record Number:CaltechAUTHORS:20201106-121153802
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Official Citation:A. Abusleme, et. al., Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 988, 2021, 164823, ISSN 0168-9002, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106493
Deposited By: Tony Diaz
Deposited On:06 Nov 2020 20:47
Last Modified:08 Jan 2021 21:16

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