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CNRF is a neutron radiography facility that uses cold neutrons installed in the JRR-3 beam hall. After JRR-3 resumed operations in 2021 following a 10-year shutdown, only an imaging system using imaging plates (IPs) was available at the CNRF. Although high-resolution images could be acquired, the system was unsuitable for continuous imaging required for computed tomography (CT) scans and dynamic imaging. Additionally, performing quantitative analysis from these images was difficult. Thus, we have introduced a new imaging system with a light-tight box, scintillator, and CMOS camera. We demonstrated the performance of the system using a new Gd test pattern. The developed camera system successfully obtained the transmission images of the test pattern. Additionally, the spatial resolution of the system was estimated to be approximately 60 µm. In contrast, CNRF was not suitable for CT imaging etc. owing to its poor L/D value, and the neutron beam must be enhanced in future research.

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Introduction of Camera System for CNRF at JRR-3

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Keisuke Kurita,
  • Hiroshi Iikura,
  • Isao Harayama,
  • Yusuke Tsuchikawa,
  • Satoshi Morooka,
  • Tetsuya Kai,
  • Takenao Shinohara,
  • Naoya Odaira,
  • Daisuke Ito,
  • Yasushi Saito,
  • Masahito Matsubayashi

摘要

CNRF is a neutron radiography facility that uses cold neutrons installed in the JRR-3 beam hall. After JRR-3 resumed operations in 2021 following a 10-year shutdown, only an imaging system using imaging plates (IPs) was available at the CNRF. Although high-resolution images could be acquired, the system was unsuitable for continuous imaging required for computed tomography (CT) scans and dynamic imaging. Additionally, performing quantitative analysis from these images was difficult. Thus, we have introduced a new imaging system with a light-tight box, scintillator, and CMOS camera. We demonstrated the performance of the system using a new Gd test pattern. The developed camera system successfully obtained the transmission images of the test pattern. Additionally, the spatial resolution of the system was estimated to be approximately 60 µm. In contrast, CNRF was not suitable for CT imaging etc. owing to its poor L/D value, and the neutron beam must be enhanced in future research.