Development and test of high efficiency WSF fluorescent converter for fast neutron radiography-猫眼课题宝

用于快速中子射线照相的高效 WSF 荧光转换器的开发和测试

DOI：

10.1016/j.nima.2008.10.016

发表时间：

2009-01

期刊：

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

影响因子：

1.4

通讯作者：

中科院分区：

物理与天体物理3区

文献类型：

作者：

A fluorescent converter used for fast neutron radiography (FNR) was developed by using the Chinese made wavelength-shifting fibers (WSFs) and mixture of hydrogen rich epoxy resin with ZnS(Ag). The performance of the WSF converter compared with that of the epoxy resin converter (ER converter) was tested at the 4.5MV Van de Graaff accelerator of Peking University as fast neutron source. Quasi-monoenergetic and continuous energy fast neutrons were derived through the D(d,n)3He and9Be(d,n)10B reactions by using a deuterium gas target and a thick beryllium target, respectively. Experiments show that the luminosity of the WSF converter is 6–7.8 times as high as that of the ER converter we used before, and the statistics of the image is much better. The relationship between the luminosity and the thickness of the WSF converter was obtained from which the saturation thickness is about 25mm. The smallest defect that can be detected by the WSF converter is about 2mm.