A Novel NDT Scanning System Based on Line Array Fast Neutron Detector and D-T Neutron Source
Sheng Wang, Chao Cao, Wei Yin, Yang Wu, Heyong Huo, Yong Sun, Bin Liu, Xin Yang, Rundong Li, Shilei Zhu, Chunlei Wu, Hang Li, Bin Tang
Abstract
A novel non-destructive testing scanning system based on a large-size line array fast neutron detector and compact D-T neutron source has been constructed. The scanning range is up to 1000 mm, and the resolution is better than 1 mm. The fast neutron detection subsystem consists of a polypropylene zinc sulfide scintillator embedded with wavelength-shifting fibers, coupled with a light lens and a scientific CCD camera. With a new rotating tritium target, the lifetime of the compact D-T neutron source could achieve ten hours. The experimental results indicate that the scanning method based on line array fast neutron detector and D-T neutron source is feasible and enables the detection of slits on the order of 0.5 mm in width. Fast neutron tomography has been realized by this detection system too.