Design experience for JUNO central detector At 700 m underground Diameter of ball 35.5 m. thickness 120 mm Diameter of stainless steel: inner 38.5 m outer 40.5 m 20 thousands of liquid scintillator(0.866g/cm3 inside water outside(lg/cm). 15,000 PMT mounted on the latticed shell 二三三三三三三三二二二二二 I Working condition Structural self weight self weight and buoyancy I of PMT+ pressure difference on the acrylic ball Acrylic vessel double-layer stainless steel
Acrylic vessel + double-layer stainless steel ➢ At 700 m underground ➢ Diameter of ball 35.5 m，thickness 120 mm ➢ Diameter of stainless steel：inner 38.5 m， outer 40.5 m. ➢ 20 thousands of liquid scintillator (0.866g/cm3 ) inside, water outside (1g/cm3 ). 15,000 PMT mounted on the latticed shell. Working condition: Structural self weight + self weight and buoyancy of PMT + pressure difference on the acrylic ball Design experience for JUNO central detector 6
Design experience for JUNO central detector Dividing method Along the latitude line: 24 Along the longitude line: 15 The point on the inner latticed shell The point on the outer latticed shell Number of the braces 564 Lighting-blocking rate: 1.8%
The point on the inner latticed shell The point on the outer latticed shell Number of the braces: 564 Lighting-blocking rate: 1.8% Dividing method Along the latitude line：24 Along the longitude line：15 7 Design experience for JUNO central detector