The design of the small prototype for the central detector of JUNO

Yang, Xiaoyu; Heng, Y. K.; Li, Huafeng; Ma, Xiaoyan; He, Wei; Qian, Xiaohui; Tao, Song; Huang, Kaimin; Pei, Yatian; Wang, Zhi; Ling, Jiajie; Yang, Lei; Li, Yang; Luo, X. L.; Wu, Shuai; Song, Wuying; Jing, Xiaoping; Li, Nan

doi:10.1007/s41605-018-0073-z

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…The acrylic sample was processed into cuboid, the size of which is 101 × 151 × 31.5 mm. The sample with bonding area is formed by two above samples through polymerization, and the width of bonding area is about 3 mm [19].…”

Section: Acrylic Stress Measurements By the Automatic Measurement Systemmentioning

confidence: 99%

The automatic measurement system for internal stress of acrylic

Yang

Heng

Chen³

et al. 2023

J. Inst.

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The manual measurement system for internal stress of acrylic was designed and realized, which is based on photo-elastic principle and spectrometric method. The manual measurement system can support mobile and quantitative measurement, and plays an important role in the fields of material research and engineering project. With the extensive application of the stress measurement system, automation is required to promote measuring efficiency and overcome the shortcomings of the manual measurement system. Electric control turntable was chosen as the key component for automation and adopted in the automatic measurement system. The automatic measurement system is controlled by program and user interface for operation has also been improved. The automatic measurement system has been realized and used for measuring internal stress of acrylic in the laboratory, which achieved the expected effect. The components of the automatic measurement system, the user interface for control program and data processing, and the stress measurements of the acrylic samples by the automatic measurement system are discussed in this article.

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Section: Acrylic Stress Measurements By the Automatic Measurement Systemmentioning

confidence: 99%

The automatic measurement system for internal stress of acrylic

Yang

Heng

Chen³

et al. 2023

J. Inst.

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“…To reduce the internal forces on the connecting bars and the stresses on the acrylic and improve the safety of the detector structure, a series of factors were studied and optimized. A prototype of the CD was made and the design was tested in 2018 [20].…”

Section: Structure Optimizationmentioning

confidence: 99%

“…Various reticulated shells, such as triangle and quadrilateral, were compared. The conclusions are that the quadrilateral frame has the advantage of a better control of the mechanical constraints for a controlled cost [20]. Taking into account the size of the acrylic panel, the light-blocking caused by the connecting nodes, the total length of the bonding lines, the axial forces, and few other factors, the stainless steel structure was finally determined with the format of the latticed shell composed of 23 latitudinal zones and 30 longitudinal zones, and the upper and lower hemispheres are symmetrically arranged, as shown in Fig.…”

Section: Optimization Of the Stainless Steel Latticed Shellmentioning

confidence: 99%

Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector

Abusleme

Adam

Ahmad

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…The JUNO CD is divided into 23 layers and the acrylic spherical panels will be installed layer by layer on site. Each piece has its own assigned installation position, and the acrylic spherical panels will be bonded by the mass polymerization [11]. Bonding is critical to the structural safety of the whole acrylic sphere, for the JUNO CD, the bonding gap usually has the width of 3 mm.…”

Section: Introductionmentioning

confidence: 99%

The study of acrylic bonding gap stress for the JUNO Central Detector

Yang¹,

Heng²,

Li³

et al. 2022

J. Inst.

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The Central Detector (CD) of Jiangmen Underground Neutrino Observatory (JUNO) has a huge acrylic spherical vessel, which will contain 20000 tons of liquid scintillator, being immersed in pure water, endure about 3 × 107 N of buoyancy. It is composed of 263 pieces of acrylic spherical panels bonded by the mass polymerization. Acrylic stress is critical to the structural safety of the JUNO CD, and it is required not to be greater than 3.5 MPa. The specialized measurement system for acrylic stress of the JUNO CD has been designed and realized, which supports non-destructive and quantitative measurement. The measurement system was applied to the main acrylic spherical panels without bonding gap first to verify stress level, which met JUNO's requirement. The bonding quality of acrylic spherical panels is critical, and the stress of bonding gap is concerned. The stresses of acrylic bonding gaps were measured using acrylic samples to help study the bonding techniques. The stress optical coefficient of acrylic bonding gap was calibrated and different bonding methods were studied and compared. We found that the objective function of numerical fitting for acrylic bonding gap needs modification when the measured optical path difference is large, which was analyzed and discussed in this article.

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The design of the small prototype for the central detector of JUNO

Cited by 9 publications

References 3 publications

The automatic measurement system for internal stress of acrylic

The automatic measurement system for internal stress of acrylic

Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector

The study of acrylic bonding gap stress for the JUNO Central Detector

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