This is a schematic diagram of a reactor neutrino event detected by the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Aug. 24, 2025. (Xinhua)
BEIJING, Aug. 26 (Xinhua) -- The world's largest transparent spherical detector began operation in China on Tuesday, making it the world's first operational ultra-large scientific facility dedicated to neutrino research with ultra-high precision.
Having completed the filling of its 20,000-tonne liquid scintillator detector, the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen of south China's Guangdong Province began taking data after more than a decade of preparation and construction.
This photo taken on Dec. 17, 2024 shows photo-multiplier tubes seen from top of the acrylic sphere of the liquid-scintillator detector in Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province. (Xinhua/Jin Liwang)This stitched photo shows the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) under construction in Jiangmen, south China's Guangdong Province, Oct. 9, 2024. (Xinhua/Jin Liwang)This photo taken on Dec. 16, 2024 shows the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province. (Xinhua/Jin Liwang)Staff members work on a stainless steel truss of the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Oct. 10, 2024. (Xinhua/Jin Liwang)Researchers applaud to celebrate the successful data acquisition at a control room of the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Aug. 26, 2025. (Photo by Liu Yuexiang/Xinhua)This is a schematic diagram of a reactor neutrino event detected by the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Aug. 24, 2025. (Xinhua)Researchers work at a control room of the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Aug. 26, 2025. (Photo by Liu Yuexiang/Xinhua)■
