Science China Technological Sciences

, Volume 57, Issue 12, pp 2523–2529 | Cite as

Application of an acrylic vessel supported by a stainless-steel truss for the JUNO central detector

  • YuanQing Wang
  • Liang Zong
  • YueKun Heng
  • ZongYi Wang
  • Yan Zhou
  • ShaoJing Hou
  • ZhongHua Qin
  • XiaoYan Ma


After the success of the Daya Bay experiment, the Jiangmen Underground Neutrino Observatory (JUNO) was launched to measure neutrino-mass hierarchy and oscillation parameters and to study other neutrino physics. Its central detector is set for antineutrinos from reactors, the Earth, the atmosphere, and the Sun. The main requirements of the central detector are containment of 20 kt of liquid scintillator, as the target mass, and 3% energy resolution. It is about a ball-shape detector of 38.5 m with ∼75% coverage of PMT on its inner surface. The design of such a huge detector is a big challenge because it must meet the requirements for several different types of physics measurement and possess the feasibility and reliability in its structure and engineering, all at reasonable time and cost. One option for the JUNO central detector is a hyper-scale acrylic ball submerged in the water to shield the background. This paper proposes a structural scheme for such an acrylic ball that is supported by a stainless-steel truss, inspired by point-supported glass-curtain walls in civil engineering. The preliminary design of the scheme is completed and verified by finite element (FE) method using ABAQUS. FE analysis shows that the scheme can control the stress level of the acrylic ball within the limit of 5 to 10 MPa, in accordance with the demand of the design objective of the central detector. The scheme is of outstanding global stability and allows various choices on local connections. We prove that the scheme is of good feasibility and should be a reasonable option for the central detector.


neutrino central detector acrylic stainless-steel truss point-supported glass-curtain wall 


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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • YuanQing Wang
    • 1
  • Liang Zong
    • 1
  • YueKun Heng
    • 2
  • ZongYi Wang
    • 3
  • Yan Zhou
    • 4
  • ShaoJing Hou
    • 2
  • ZhongHua Qin
    • 2
  • XiaoYan Ma
    • 2
  1. 1.Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil EngineeringTsinghua UniversityBeijingChina
  2. 2.Central Detector GroupInstitute of High Energy Physics (IHEP)BeijingChina
  3. 3.School of Civil and Architectural EngineeringWuhan UniversityWuhanChina
  4. 4.Key Laboratory of New Technology for Construction of Cities in Mountain Area, Department of Civil EngineeringChongqing UniversityChongqingChina

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