中国地下700米，有了个全球第一！

Core Insights - The Jiangmen Neutrino Experiment, a significant scientific facility in China, has officially commenced operations, marking it as the world's first large-scale and high-precision neutrino detection facility [1][6]. Group 1: Facility Overview - The Jiangmen Neutrino Experiment is located 700 meters underground in Jiangmen, Guangdong Province, and is capable of detecting neutrinos produced by the Taishan and Yangjiang nuclear power plants, which are 53 kilometers away [3]. - This facility aims to capture elusive neutrinos, which are considered crucial for understanding the universe's past and future [4]. Group 2: Technology and Innovation - The key technology for detecting neutrinos involves photomultiplier tubes, which can detect the faint light emitted when neutrinos interact with scintillating materials. The brightness of this light is one billionth of that of a smartphone screen [4]. - Chinese scientists have successfully developed their own photomultiplier tubes, breaking a foreign monopoly and reducing the cost of individual tubes by over 50%, resulting in savings of several hundred million yuan for the project [4].