The design of the small prototype for the central detector of JUNO
The design of the small prototype for the central detector of JUNO
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DOI：
10.1007/s41605-018-0073-z
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发表时间：
2018-08
影响因子：
0.6
通讯作者：
Xiaoyu Yang;Yue-kun Heng;Huafeng Li;Xiaoyan Ma;W. He;X. Qian;T. Song;Kaixi Huang;Y. Pei;Zhi Wu;Jiajie Ling;Lei Yang;Yi Li;Xiaolan Luo;Shuai Wu;Wuying Song;X. Jing;Nan Li
中科院分区：
文献类型：
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作者：
Xiaoyu Yang;Yue-kun Heng;Huafeng Li;Xiaoyan Ma;W. He;X. Qian;T. Song;Kaixi Huang;Y. Pei;Zhi Wu;Jiajie Ling;Lei Yang;Yi Li;Xiaolan Luo;Shuai Wu;Wuying Song;X. Jing;Nan Li
江门地下中微子观测站（JUNO）是一个多用途的中微子实验站，旨在确定中微子质量等级，精确测量振荡参数，研究太阳中微子、超新星中微子和地中微子。JUNO中心探测器20 kton液体闪烁体靶质量被包含在一个内径为35.4 m的巨大丙烯酸球体中，由不锈钢结构支撑，球体最终浸没在纯水中。动机在JUNO中心探测器建造之前，设计了小型样机，并进行了静载试验，验证了有限元分析的一致性，元计算和静态加载实验，并测试子系统的性能，如监测系统和液体闪烁填充system.MethodsThe小原型是由一个丙烯酸球体与一个3 m的内径和铝合金支撑结构。本文简要介绍了小型样机的结构。使用有限元分析进行详细的模拟研究，以说明液体填充条件，温度变化和存在的高负载（由于真空泵），并证明了一个令人满意的机械性能的小原型。并在此基础上提出了样机的实验方案。
BackgroundThe Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino experiment designed to determine neutrino mass hierarchy, precisely measure oscillation parameters and study solar neutrinos, supernova neutrinos and geo-neutrinos. The JUNO Central Detector 20 kton liquid scintillator target mass is contained by a huge acrylic sphere with a 35.4 m inner diameter, supported by a stainless steel structure, and the sphere is eventually submerged in pure water.MotivationBefore the JUNO Central Detector is built, a small prototype has been designed and static loading experiments will be carried out to verify the consistency of the finite-element calculations and static loading experiments and test the subsystems performances, such as the monitoring system and liquid scintillator filling system.MethodsThe small prototype is composed of an acrylic sphere with a 3 m inner diameter and an aluminum alloy support structure. In this article, the structure of the small prototype is briefly described. A detailed simulation study using finite element analysis is conducted to account for liquid-filled condition, temperature variation and existence of high load (due to vacuum pumping) and demonstrate a satisfying mechanical performance of the small prototype. The experimental plan about the prototype on the basis of the simulation will also be mentioned.