This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction phase.The determination of neutrino mass ordering in JUNO requires an ...This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction phase.The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV.To achieve this ambitious goal,significant efforts have been undertaken in the design and production of the key components of the JUNO detector.Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,performance of photomultiplier tubes,and the energy reconstruction algorithm.To account for these effects,a full JUNO simulation and reconstruction approach is employed.This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution.The results of this study reveal an energy resolution of 2.95% at 1 Mev.Furthermore,this study assesses the contribution of major effects to the overall energy resolution budget.This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data collection.Moreover,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.展开更多
Purpose The Taishan Antineutrino Observatory(TAO)is a satellite experiment of the Jiangmen Underground Neutrino Observatory(JUNO),also known as JUNO-TAO.Located close to one of the reactors of the Taishan Nuclear Powe...Purpose The Taishan Antineutrino Observatory(TAO)is a satellite experiment of the Jiangmen Underground Neutrino Observatory(JUNO),also known as JUNO-TAO.Located close to one of the reactors of the Taishan Nuclear Power Plant,TAO will measure the antineutrino energy spectrum precisely as a reference spectrum for JUNO.The data acquisition(DAQ)system is designed to acquire data from the TAO readout electronics and process it with software trigger and data compression algorithms.The data storage bandwidth is limited by the onsite network to be less than 100 Mb/s.Methods The system is designed based on a distributed architecture,with fully decoupled modules to facilitate customized design and implementation.It is divided into two main components:the data flow system and the online software.The online software serves as the foundation,providing the electronics configuration,the process management,the run control,and the information sharing.The data flow system facilitates continuous data acquisition from various electronic boards or trigger systems,assembles and processes raw data,and ultimately stores it on the disk.Results The core functionality of the system has been designed and developed.The usability of the data flow system interface and the software trigger results have been verified during the pre-installation testing phase.Conclusion The DAQ system has been deployed for the TAO experiment.It has also successfully been applied to the integration test of the detector and electronics prototypes.展开更多
基金Supported by the Chinese Academy of Sciencesthe National Key R&D Program of China+20 种基金the CAS Center for Excellence in Particle Physics,Wuyi Universitythe Tsung-Dao Lee Institute of Shanghai Jiao Tong University in Chinathe Institut National de Physique Nucléaire et de Physique de Particules(IN2P3)in Francethe Istituto Nazionale di Fisica Nucleare(INFN)in Italythe Italian-Chinese collaborative research program MAECI-NSFCthe Fond de la Recherche Scientifique(F.R.S-FNRS)FWO under the"Excellence of Science-EOS"in Belgiumthe Conselho Nacional de Desenvolvimento Científico e Tecnològico in Brazilthe Agencia Nacional de Investigacion y Desarrollo and ANID Millennium Science Initiative Program—ICN2019_044 in Chilethe Charles University Research Centre and the Ministry of Education,Youth,and Sports in Czech Republicthe Deutsche Forschungsgemeinschaft(DFG)the Helmholtz Associationthe Cluster of Excellence PRISMA+in Germanythe Joint Institute of Nuclear Research(JINR)Lomonosov Moscow State University in Russiathe joint Russian Science Foundation(RSF)National Natural Science Foundation of China(NSFC)research programthe MOST and MOE in Taiwan,Chinathe Chulalongkorn University and Suranaree University of Technology in Thailandthe University of California at Irvinethe National Science Foundation in USA。
文摘This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction phase.The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV.To achieve this ambitious goal,significant efforts have been undertaken in the design and production of the key components of the JUNO detector.Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,performance of photomultiplier tubes,and the energy reconstruction algorithm.To account for these effects,a full JUNO simulation and reconstruction approach is employed.This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution.The results of this study reveal an energy resolution of 2.95% at 1 Mev.Furthermore,this study assesses the contribution of major effects to the overall energy resolution budget.This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data collection.Moreover,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences,Grant No.XDA10000000 and XDA10010700State Key Laboratory of Particle Detection and Electronics(SKLPDE)Grant No.SKLPDE-ZZ-202305National Key R&D Program of China by the Ministry of Science and Technology(MoST),Grant No.2022YFA1602002.
文摘Purpose The Taishan Antineutrino Observatory(TAO)is a satellite experiment of the Jiangmen Underground Neutrino Observatory(JUNO),also known as JUNO-TAO.Located close to one of the reactors of the Taishan Nuclear Power Plant,TAO will measure the antineutrino energy spectrum precisely as a reference spectrum for JUNO.The data acquisition(DAQ)system is designed to acquire data from the TAO readout electronics and process it with software trigger and data compression algorithms.The data storage bandwidth is limited by the onsite network to be less than 100 Mb/s.Methods The system is designed based on a distributed architecture,with fully decoupled modules to facilitate customized design and implementation.It is divided into two main components:the data flow system and the online software.The online software serves as the foundation,providing the electronics configuration,the process management,the run control,and the information sharing.The data flow system facilitates continuous data acquisition from various electronic boards or trigger systems,assembles and processes raw data,and ultimately stores it on the disk.Results The core functionality of the system has been designed and developed.The usability of the data flow system interface and the software trigger results have been verified during the pre-installation testing phase.Conclusion The DAQ system has been deployed for the TAO experiment.It has also successfully been applied to the integration test of the detector and electronics prototypes.
