IT House June 26 news, according to the Institute of High Energy Physics, Chinese Academy of Sciences, June 24, Jiangmen Neutrino Experiment (JUNO)700 meters undergroundIn the experimental hall ofCenter detector stainless steel main structureInstallation completed successfully.
According to reports, the core detection equipment of Jiangmen Neutrino Experiment – the central detector is located in the center of the 44-meter-deep pool in the underground experiment hall. Its stainless steel main structure is designed withAbout 41 meters in diameterAs the main support structure of the detector, it will carry a 35.4-meter-diameter plexiglass sphere, 20,000 tons of liquid scintillators, 20,000 20-inch photomultiplier tubes, two Fifteen thousand 3-inch photomultiplier tubes, front-end electronics, cables, anti-magnetic coils, baffles and many other key components.
The stainless steel main structure is made of prefabricated welded H-beams spliced together by 120,000 sets of high-strength bolts. The manufacturing precision of the structure is very high. The installation gap between the connecting hole and the ring groove rivet is not more than 1 mm.The assembly precision of spherical reticulated shell mesh is less than 3 mmis the largest single stainless steel main structure in China.
The closure of the stainless steel main structure also means thatBeginning of on-site installation of plexiglass ballsThe plexiglass ball in the central detector structure has a diameter of 35.4 meters, a wall thickness of 120 mm, and a weight of more than 600 tons. It is the largest single plexiglass structure in the world. There is no precedent for production and construction at home and abroad. How to break through the traditional process, The successful completion of the construction of the sphere in a short period of time was another huge challenge for the project team.
IT Home has learned that the Jiangmen neutrino experiment is the next to the Daya Bay reactor neutrino experiment.Second large-scale neutrino experiment hosted by China, construction started on January 10, 2015 in Jinji Town, Kaiping City, Jiangmen, Guangdong Province. The detector of Jiangmen Neutrino Experiment Center will be the liquid scintillator detector with the highest energy precision and the largest scale in the world.
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