Speaker
Description
The Jiangmen Underground Neutrino Observatory (JUNO), its primary goal is to determine the neutrino mass hierarchy and precisely measure the oscillation parameters by detecting reactor anti-neutrinos, is under construction. 20000 PMTs , including 5000 Hamamatsu dynode PMTs and 15000 NNVT MCP PMTs, are designed to capture photos emitting from the central detector, where the neutrinos enter and react with the liquid scintillator. To reach the physics goal of JUNO, on the one hand, the PMTs should be arranged as close as possible to achieve highest cover rate, so the PMTs should be protected to avoid suffering from chain implosion; On the other hand, the failure rate of the PMT waterproofing should be below than 0.5% for the first 6 years. Design and test of the PMT implosion and waterproof potting have been made and will be shown in this poster.
