地下700米捕捉宇宙“幽灵粒子”

Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has successfully completed the infusion of 20,000 tons of liquid scintillator and has officially begun data collection, marking a significant milestone in neutrino research [5][9] - This facility is the first large-scale, high-precision neutrino detector in the world, aimed at addressing major questions in particle physics, particularly the mass ordering of neutrinos [5][6] Project Overview - The JUNO project was proposed by the Institute of High Energy Physics of the Chinese Academy of Sciences in 2008, receiving support from the Chinese Academy of Sciences and the Guangdong provincial government [8] - Construction began in 2015, with the laboratory completed in December 2021, and the detector's main construction expected to be finished by December 2024 [8] Technical Achievements - The core detector has an effective mass of 20,000 tons and is located 700 meters underground, allowing it to detect neutrinos from nearby nuclear power plants with unprecedented precision [6][9] - The detector's construction involved the infusion of over 60,000 tons of ultra-pure water within 45 days, ensuring safety and stability [8] International Collaboration - The JUNO project involves 700 researchers from 17 countries and regions, highlighting significant international collaboration in advancing neutrino detection technology [9] - The project is expected to have a lifespan of 30 years, with potential upgrades to enhance its capabilities for future experiments [9]