未来中国科技发展的战略选择(一)

2002年12月26-27日,科学技术部在北京举办了首届"中国科技发展新世纪论坛"。来自海内外著名大学和科研机构的高层科学家及科技发展战略专家,以及科学技术部、中国科学院、中国工程院、国家自然科学基金委、中国科学技术协会的负责人,共五十余人参加了论坛。会议的主要议题是:未来二十年世界科技发展趋势,特别是有可能形成新突破的领域分析;全球化给发展中国家科技进步带来的机遇与挑战,特别是中国在全球科技发展中的地位、作用;科技社会化对科技发展的影响及如何建立科技与社会的互动机制;当前中国科技政策评价及政策建议;未来中国科技发展的战略选择。与会专家学者围绕会议主题畅所欲言,提出了许多具有建设性的见解和建议。为了引起全社会更多地关注中国科技发展,我们将与会者的发言进行了整理,独家刊载,以飨读者

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in 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 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 study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the 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 taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors