Neutron collimator design of neutron radiography basedon the BNCT facility

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YANG Xiao-Peng, YU Bo-Xiang, LI Yi-Guo, PENG Dan, LU Jin, ZHANG Gao-Long, ZHAO Hang, ZHANG Ai-Wu, LI Chun-Yang, LIU Wan-Jin, HU Tao and Neutron collimator design of neutron radiography basedon the BNCT facility[J]. Chinese Physics C, 2014, 38(2): 028201. doi: 10.1088/1674-1137/38/2/028201
YANG Xiao-Peng, YU Bo-Xiang, LI Yi-Guo, PENG Dan, LU Jin, ZHANG Gao-Long, ZHAO Hang, ZHANG Ai-Wu, LI Chun-Yang, LIU Wan-Jin, HU Tao and Neutron collimator design of neutron radiography basedon the BNCT facility[J]. Chinese Physics C, 2014, 38(2): 028201.  doi: 10.1088/1674-1137/38/2/028201 shu
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Received: 2013-03-26
Revised: 2013-05-03
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Neutron collimator design of neutron radiography basedon the BNCT facility

    Corresponding author: YANG Xiao-Peng,
    Corresponding author: YU Bo-Xiang,

Abstract: For the research of CCD neutron radiography, a neutron collimator was designed based on the exit of thermal neutron of the Boron Neutron Capture Therapy (BNCT) reactor. Based on the Geant4 simulations, the preliminary choice of the size of the collimator was determined. The materials were selected according to the literature data. Then, a collimator was constructed and tested on site. The results of experiment and simulation show that the thermal neutron flux at the end of the neutron collimator is greater than 1.0·106 n/cm2/s, the maximum collimation ratio (L/D) is 58, the Cd-ratio(Mn) is 160 and the diameter of collimator end is 10 cm. This neutron collimator is considered to be applicable for neutron radiography.

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