现代应用物理Issue(1)：21-25,58,6.
裂变中子辐射场反冲质子探测系统的优化设计
Optimization of Recoil-Proton Detection System Used in Fission Neutron Field
摘要
Abstract
The key problem in measurement of high energy neutron fluence in intense pulsed fission neutron-gamma mixed field using recoil-proton detection system is to improve its sig-nal-to-noise ratioSNR.In this paperwe use MCNPX code and the watt spectrum as input spectrum to investigate the possibility of improving the SNR of a recoil-proton detection sys-tem by changing the structure of the detection system.The study includes the influence of the dimension of the target and the PIN detectorthe angle of the wings of the target cham-berthe thickness of the Ni window of the chamberas well as the shield structure of the de-tection system.The results show that SNR can be obviously improved by decreasing the thickness of the detector or the angle of the wings of the chamberand decreasing the thick-ness of the Ni window or using the bell-mouthed shield are also helpful.关键词
反冲质子探测系统/PIN探测器/裂变中子/高能中子/信噪比Key words
recoil-proton detection system/PIN detector/fission neutron/high energy neu-tron/signal-to-noise ratio分类
数理科学引用本文复制引用
张显鹏,张忠兵,陈亮,张建福..裂变中子辐射场反冲质子探测系统的优化设计[J].现代应用物理,2014,(1):21-25,58,6.基金项目
国家自然科学基金资助项目 （）
