准单能中子单粒子效应研究现状

Quasi-monoenergetic neutron single event effects

对国际上用于单粒子效应(SEE)研究的准单能中子源进行了相关调研,对产生准单能中子源的7 Li(p,n)7Be核反应、装置布局以及表征中子场性质的中子注量率、中子能谱、中子束流轮廓及其均匀性、热中子本底等参数的理论计算及实验测量进行了系统的介绍。进行准单能中子SEE实验要求中子源有较高的中子注量率水平、较大的束流轮廓、较好的束流均匀性以及较低的热中子本底,并且能测量出精确的中子能谱。对准单能中子SEE实验过程以及三种中子SEE截面的尾部修正方法进行了介绍。

The international quasi-monoenergetic neutron sources for the single event effect (SEE) study are investigated,the related issues including the ^7 Li(p,n)^ 7 Be nuclear reaction,the facility layout,and the theoretical calculations and experimental measurements of the neutron field parameters such as the neutron flux,the neutron energy spectrum,the neutron beam profile and its uniformity,and the thermal neutron background,are systematically introduced.The quasi-monoenergetic neutron SEE experiments require that the neutron source have a high neutron flux,large and uniform beam spot,and low thermal neutron background,and that an accurate neutron energy spectrum be obtained through experiments.The quasi-monoenergetic neutron SEE experiments and three methods for the tail correction of neutron SEE cross sections are introduced.