Neutron collimator design of neutron radiography based on the BNCT facility

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 ac...

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Bibliographic Details
Published in:Chinese physics C 2014-02, Vol.38 (2), p.97-100
Main Author: 杨晓鹏 俞伯祥 李义国 彭旦 鲁谨 张高龙 赵航 章爱武 李春阳 刘万金 胡涛 吕军光
Format: Article
Language:English
Subjects:
Cadmium
Capture (nuclear)
Collimators
Geant4
Neutron flux
Neutron radiography
Reactors
Simulation
Thermal neutrons
中子照相
准直器
基础
文献数据
硼中子俘获治疗
设施
设计
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Summary: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 1.0×10^6n/cm^2/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.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/2/028201