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Volume 4 Issue 3
Sep.  2020
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The measurement system of acrylic transmittance for the JUNO central detector

  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

  • 2. State Key Laboratory of Particle Detection and Electronics, Beijing, 100049, China;

  • 3. University of Chinese Academy of Science, Beijing, 100049, China

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This work is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No.XDA100102).

More Information
  • Received Date: March 31, 2020
  • Revised Date: May 10, 2020
  • Accepted Date: May 18, 2020
  • Available Online: October 17, 2022
  • Published Date: June 15, 2020
    Abstract
  • Background The Jiangmen Underground Neutrino Observatory (JUNO) has 20 kilo-ton liquid scintillator as target mass contained by a huge acrylic sphere to carry out the research on neutrino physics. Acrylic transmittance is considered as an important optical performance of the JUNO Central Detector as it has a direct relationship to the number of photons detected by the JUNO Central Detector and further affects the energy resolution of JUNO.
    Motivation The transmittance requirement of acrylic spherical panel for the JUNO Central Detector is exceeding 96% at the wavelength of 420 nm in ultrapure water and a specific measurement system was built and studied in Institute of High Energy Physics for this purpose, as the existing equipment cannot perform the sample test in the liquid and support the long sample length of 120 mm.
    Methods After improving the technology of thermoforming, the transmittances of the acrylic spherical panels meet the requirement of JUNO, which guarantees the batch production of acrylic panels on time. The design of the measurement system, the constitution of hardware, the development of control and data acquisition software are introduced, and the measurement uncertainty of the system and the transmittance results of the acrylic samples from the spherical panel are discussed in this article.
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    • References (17)
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    • Xiaoyu Yang, Nan Li, Yuekun Heng, et al. The measurement system of acrylic transmittance for the JUNO central detector[J]. Radiation Detection Technology and Methods, 2020, 4(3): 284-292. DOI: 10.1007/s41605-020-00182-0
    Citation: Xiaoyu Yang, Nan Li, Yuekun Heng, et al. The measurement system of acrylic transmittance for the JUNO central detector[J]. Radiation Detection Technology and Methods, 2020, 4(3): 284-292. DOI: 10.1007/s41605-020-00182-0
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    1. Miao He, Zhonghua Qin, Diru Wu, et al. Mass production and performance study on the 20-inch PMT acrylic protection covers in JUNO. Journal of Instrumentation, 2024, 19(05): T05003. DOI:10.1088/1748-0221/19/05/T05003
    2. Xiaoyu Yang, Yuekun Heng, Meihang Xu, et al. Research on the optical properties and effect of the transparent epoxy for the JUNO central detector. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2024, 1064: 169466. DOI:10.1016/j.nima.2024.169466
    3. Angel Abusleme, Thomas Adam, Shakeel Ahmad, et al. The design and technology development of the JUNO central detector. The European Physical Journal Plus, 2024, 139(12) DOI:10.1140/epjp/s13360-024-05830-8
    4. Miao He, Zhonghua Qin, Shaojing Hou, et al. Design of the PMT underwater cascade implosion protection system for JUNO. Journal of Instrumentation, 2023, 18(02): P02013. DOI:10.1088/1748-0221/18/02/P02013
    5. Xiaoyu Yang, Yuekun Heng, Zhiqiang Chen, et al. The automatic measurement system for internal stress of acrylic. Journal of Instrumentation, 2023, 18(03): P03044. DOI:10.1088/1748-0221/18/03/P03044
    6. Zhaohan Li, Xiaoyu Yang, Yuekun Heng, et al. Laser measurement system for acrylic transmittance of JUNO central detector. Radiation Detection Technology and Methods, 2021, 5(3): 356. DOI:10.1007/s41605-021-00254-9
    7. Xiaoyu Yang, Nan Li, Yuekun Heng, et al. Study on acrylic transmittance for JUNO Central Detector. Radiation Detection Technology and Methods, 2021, 5(2): 284. DOI:10.1007/s41605-021-00242-z
    8. X. Yang, Y. Heng, Z. Li, et al. The stress measurement system for the JUNO Central Detector acrylic panels. Journal of Instrumentation, 2021, 16(12): P12040. DOI:10.1088/1748-0221/16/12/P12040

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