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<p>The Taishan Antineutrino Observatory (TAO) experiment features a top veto tracker system comprising 160 modules, each constructed from plastic scintillator (PS) strips, embedded wavelength shifting fibers (WLS-fibers), and silicon photomultipliers. This article reports on the performance of all produced modules, focusing on the production and readout/trigger design, and providing insights into scintillation detectors based on WLS-fibers. Three types of trigger modes and their efficiencies were defined to comprehensively evaluate the performance of this unique design, which was verified through batch production, comprehensive measurement strategies, and quality inspection methods. In “module” mode, the detection&#xa0;(tagging) efficiency of the PS exceeded 99.67% at a 30-photoelectron threshold, and even in “AND” mode, it surpassed 99.60% at a 15-photoelectron threshold. The muon tagging efficiency satisfies the requirements of TAO. The production and performance of PS modules establish a benchmark for other experiments, with optimized optical fiber arrangements that enhance light yield and muon detection efficiency.</p>

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Performance of plastic scintillator modules for top veto tracker at Taishan Antineutrino Observatory

  • 期刊论文

  • 发表日期：

    2025年4月11日

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  • Guang Luo,
  • Xiao-Hao Yin,
  • Feng-Peng An,
  • Zhi-Min Wang,
  • Y. K. Hor,
  • Pei-Zhi Lu,
  • Ru-Hui Li,
  • Yi-Chen Li,
  • Wei He,
  • Wei Wang,
  • Xiang Xiao

摘要

The Taishan Antineutrino Observatory (TAO) experiment features a top veto tracker system comprising 160 modules, each constructed from plastic scintillator (PS) strips, embedded wavelength shifting fibers (WLS-fibers), and silicon photomultipliers. This article reports on the performance of all produced modules, focusing on the production and readout/trigger design, and providing insights into scintillation detectors based on WLS-fibers. Three types of trigger modes and their efficiencies were defined to comprehensively evaluate the performance of this unique design, which was verified through batch production, comprehensive measurement strategies, and quality inspection methods. In “module” mode, the detection (tagging) efficiency of the PS exceeded 99.67% at a 30-photoelectron threshold, and even in “AND” mode, it surpassed 99.60% at a 15-photoelectron threshold. The muon tagging efficiency satisfies the requirements of TAO. The production and performance of PS modules establish a benchmark for other experiments, with optimized optical fiber arrangements that enhance light yield and muon detection efficiency.