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Purpose <p>Neutron resonance transmission imaging (NRTI) is an advanced neutron radiography technique that identifies nuclide composition and distribution through characteristic resonance absorption peaks. This study describes the development and application of an imaging system based on a <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(^{10}\text {B}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mn>10</mn> </mmultiscripts> <mtext>B</mtext> </mrow> </math></EquationSource> </InlineEquation>-doped microchannel plate (B-MCP) detector for NRTI experiments.</p> Methods <p>The experiment was conducted at the Back-n white neutron facility of the China Spallation Neutron Source (CSNS), which delivers high-flux neutrons from 0.3&#xa0;eV to 300&#xa0;MeV. A specialized event reconstruction algorithm was developed to resolve pileup signals and accurately reconstruct neutron events from the B-MCP detector.</p> Results <p>The imaging system achieved a spatial resolution of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(97~\upmu \text {m}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>97</mn> <mspace width="3.33333pt" /> <mi mathvariant="normal">μ</mi> <mtext>m</mtext> </mrow> </math></EquationSource> </InlineEquation> and covered an NRTI energy range from eV to 100&#xa0;keV. Experimental results demonstrated the successful identification and spatial mapping of heavy and medium-weight elements, including gold, silver, copper, iron, and aluminum, utilizing resonance peaks spanning from the eV region to hundreds of keV.</p> Conclusion <p>The developed B-MCP imaging system and reconstruction algorithm proved effective for NRTI at the CSNS Back-n facility, offering superior capabilities for nondestructive elemental analysis compared to conventional imaging methods.</p>

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Commissioning of a \(^{10}\text {B}\)-doped neutron-sensitive MCP detector for neutron resonance transmission imaging at CSNS Back-n white neutron source

  • 期刊论文

  • 发表日期：

    2026年3月14日

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  • Supeng Lu,
  • Yijia Qiu,
  • Han Yi,
  • Qiang Li,
  • Kai Pan,
  • Rong Zhang,
  • Wenhao Duan,
  • Maoyuan Zhao,
  • Zhen Chen,
  • Changqing Feng,
  • Minhao Gu,
  • Mohan Zhang,
  • Hangchang Zhang,
  • Changjun Ning,
  • Pengcheng Wang,
  • Xiaoyang Sun,
  • Shulin Liu,
  • Yonghao Chen,
  • Wei Jiang,
  • Ruirui Fan,
  • Haizheng Chen,
  • Hongkun Chen,
  • Tianzhi Chu,
  • Shengda Tang,
  • Lirei Zeng,
  • Shiqi Hu,
  • Xin Tong,
  • Jingyu Tang

摘要

Purpose

Neutron resonance transmission imaging (NRTI) is an advanced neutron radiography technique that identifies nuclide composition and distribution through characteristic resonance absorption peaks. This study describes the development and application of an imaging system based on a \(^{10}\text {B}\) 10 B -doped microchannel plate (B-MCP) detector for NRTI experiments.

Methods

The experiment was conducted at the Back-n white neutron facility of the China Spallation Neutron Source (CSNS), which delivers high-flux neutrons from 0.3 eV to 300 MeV. A specialized event reconstruction algorithm was developed to resolve pileup signals and accurately reconstruct neutron events from the B-MCP detector.

Results

The imaging system achieved a spatial resolution of \(97~\upmu \text {m}\) 97 μ m and covered an NRTI energy range from eV to 100 keV. Experimental results demonstrated the successful identification and spatial mapping of heavy and medium-weight elements, including gold, silver, copper, iron, and aluminum, utilizing resonance peaks spanning from the eV region to hundreds of keV.

Conclusion

The developed B-MCP imaging system and reconstruction algorithm proved effective for NRTI at the CSNS Back-n facility, offering superior capabilities for nondestructive elemental analysis compared to conventional imaging methods.