Open AccessHigh-sensitivity fast neutron radiography system
Author(s) -
Faqiang Zhang,
Yang Jian-Lun,
Zhenghong Li,
Zhong Yao-Hua,
Fan Ye,
Yi Qu,
Faxin Chen,
Ying Chun-Tong,
Liu Guang-Jun
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.583
Subject(s) - neutron , optics , neutron imaging , neutron generator , scintillation , neutron detection , physics , radiation , neutron temperature , neutron radiation , materials science , nuclear physics , detector
Introduced in this paper is a fast neutron radiography system, which is mainly composed of a scintillation fiber array and a scientific grade optical CCD. The 14 MeV neutrons produced by deuterium-tritium fusion reactions, penetrate through objects and fall into a 50 mm×50 mm scintillation fiber array, and the neutron radiation is converted to green light (496 nm). The array has a length of 100 mm, consisting of 100×100 square scintillation fibers each with a cross-section of 500 μm×500 μm. For 14 MeV neutrons, the detection efficiency is as high as 21.4%. To avoid direct radiation from neutrons, the CCD is coupled to the array by a mirror and lens optics. By taking into account the factors affecting image quality, the resolution is estimated to be 1.5 mm. Several neutron radiographs have been obtained successfully in experiments carried out on K400 neutron generator.