Neutron collimator design of neutron radiography basedon the BNCT facility

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

doi:10.1088/1674-1137/38/2/028201

Chinese Physics C> 2014, Vol. 38> Issue(2) : 028201 DOI: 10.1088/1674-1137/38/2/028201

Neutron collimator design of neutron radiography basedon the BNCT facility

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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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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

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Received: 2013-03-26
Revised: 2013-05-03

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Neutron collimator design of neutron radiography basedon the BNCT facility

Corresponding author: YANG Xiao-Peng,

Corresponding author: YU Bo-Xiang,

Received Date: 2013-03-26

Accepted Date: 2013-05-03

Available Online: 2014-02-05

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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Neutron collimator design of neutron radiography basedon the BNCT facility

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