超越国际同类实验十到二十年数据积累 江门中微子实验圆满完成工程建设任务

Core Insights - The Jiangmen Neutrino Experiment has successfully completed its construction and research tasks after over a decade, achieving data accumulation results that surpass international counterparts by 10 to 20 years [1][4]. Group 1: Project Overview - The Jiangmen Neutrino Experiment is the world's first new-generation large-scale, high-precision neutrino experimental facility, officially operational for two months and has already set two world records for neutrino oscillation parameters [4]. - The project timeline spans from the proposal in 2008, construction initiation in 2013, to the expected completion and first results by 2025, totaling 17 years [4]. Group 2: Technological Achievements - The construction of the large scientific facility serves as a catalyst for scientific advancement and drives technological upgrades across multiple fields [3]. - Key technological milestones include the development and mass production of a new type of photomultiplier tube with international-leading performance metrics, and the purification production of a liquid scintillator with extremely low radioactive background [3]. - The project team overcame significant technical challenges, including the implementation of a high-speed readout electronic system for underwater photomultiplier tubes and achieving an optical coverage rate with only 3mm gaps between adjacent tubes [3].