Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Study on the neutron imaging detector with high spatial resolution at China spallation neutron source

  • Jiang, Xingfen (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Xiu, Qinglei (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Zhou, Jianrong (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Yang, Jianqing (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Tan, Jinhao (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Yang, Wenqin (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Zhang, Lianjun (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Xia, Yuanguang (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Zhou, Xiaojuan (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Zhou, Jianjin (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Zhu, Lin (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Teng, Haiyun (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Yang, Gui-an (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Song, Yushou (Key Discipline Laboratory of Nuclear Safety and Simulation Technology, Harbin Engineering University) ;
  • Sun, Zhijia (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences) ;
  • Chen, Yuanbo (State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences)
  • Received : 2020.05.30
  • Accepted : 2020.12.09
  • Published : 2021.06.25
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Abstract

Gadolinium oxysulfide (GOS) is regarded as a novel scintillator for the realization of ultra-high spatial resolution in neutron imaging. Monte Carlo simulations of GOS scintillator show that the capability of its spatial resolution is towards the micron level. Through the time-of-flight method, the light output of a GOS scintillator was measured to be 217 photons per captured neutron, ~100 times lower than that of a ZnS/LiF:Ag scintillator. A detector prototype has been developed to evaluate the imaging solution with the GOS scintillator by neutron beam tests. The measured spatial resolution is ~36 ㎛ (28 line pairs/mm) at the modulation transfer function (MTF) of 10%, mainly limited by the low experimental collimation ratio of the beamline. The weak light output of the GOS scintillator requires an enormous increase in the neutron flux to reduce the exposure time for practical applications.

Keywords

Acknowledgement

This work was supported by the National Key R&D Program of China (Grant No. 2017YFA0403702), the National Natural Science Foundation of China (Grant Nos. U1832119, 11635012 and 11775243), Youth Innovation Promotion Association CAS, and Guangdong Basic and Applied Basic Research Foundation (Grant No. 2019A1515110217).

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