摘要
空间中子会对在轨航天器的电子系统造成损伤,并可能对执行任务宇航员的生命安全造成严重威胁。准确分析空间的中子环境特性,是保障航天器抗辐射加固设计合理和宇航员生命安全的前提。基于Fluka软件利用蒙特卡罗的方法模拟、分析、设计了基于塑料闪烁体的复合结构中子探测器,从探头尺寸、结构位置、探测效率、反符合结构等方面进行了仿真分析,确定了探测器的0.5 mm、3 mm梯度复合结构,并利用14~25 MeV的单能中子进行了试验验证。结果表明:设计的探测器可用于空间站舱内中子环境以及近地空间中子探测,能够为后续的工程载荷设计提供理论和技术支持。
[Background]Space neutrons can cause damage to the electronic systems of orbiting spacecraft and may pose a serious threat to the lives of astronauts on mission.[Purpose]This study aims to accurately analyze the characteristics of the space neutron environment to ensure the reasonable design of spacecraft's anti-radiation reinforcement and the safety of astronauts.[Methods]Monte Carlo method based Fluka software was employed to simulate,analyze and design a composite structure neutron detector based on plastic scintillator.Simulation analysis from the aspects of probe size,structure position,detection efficiency,anti-coincidence structure,etc.,was performed to determine the 0.5 mm,3 mm gradient composite structure of the detector by using 14~25 MeV single energy neutrons for experimental verification.[Results]The simulation and experimental results show that the designed detector can be used for space station cabin neutron environment and near-Earth space neutron detection.[Conclusions]This study provides theoretical and technical support for subsequent engineering load design.
作者
文轩
安恒
杨生胜
王鷁
常思远
高欣
王俊
张晨光
冯展祖
WEN Xuan;AN Heng;YANG Shengsheng;WANG Yi;CHANG Siyuan;GAO Xin;WANG Jun;ZHANG Chenguang;FENG Zhanzu(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment,Lanzhou 730000,China)
出处
《核技术》
CAS
CSCD
北大核心
2020年第12期49-57,共9页
Nuclear Techniques
基金
空间环境材料行为及评价技术国防科技重点实验室资助。
关键词
高能中子
空间站
深空探测
探测器设计与分析
High-energy neutron
Space station
Deep space detection
Detector design and analysis
