Numerical study of point spread function of a fast neutron radiography system based on scintillating-fiber array

作     者：ZHANG FaQiang LI ZhengHong YANG JianLun YE Fan WANG Zhen XIA GuangXin YING ChunTong LIU GuangJun 

作者机构：Institute of Nuclear Physics and ChemistryMianyang 621900China Department of Engineering PhysicsTsinghua UniversityBeijing 100084China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2007年第50卷第6期

页      面：698-706页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：Supported by the Foundation of Double-Hundred Talents of China Academy of Engineering Physics (Grant No. 2004R0301) 

主　　题：fast neutron radiography scintillating-fiber array point spread function Monte Carlo simulation 

摘      要：For a scintillating-fiber array fast-neutron radiography system,a point-spread-function computing model was introduced,and the simulation code was developed. The results of calculation show that fast-neutron radiographs vary with the size of fast neutron sources,the size of fiber cross-section and the imaging geometry. The results suggest that the following qualifications are helpful for a good point spread function: The cross-section of scintillating fibers not greater than 200 μm×200 μm,the size of neutron source as small as a few millimeters,the distance between the source and the scintillating fiber array greater than 1 m,and inspected samples placed as close as possible to the array. The results give suggestions not only to experiment considerations but also to the estimation of spatial resolution for a specific system.