磁场下夹层结构的高能电子屏蔽性能
发布时间：2018-12-19 21:18
【摘要】：针对空间高能电子环境可能造成的航天设备故障、宇航员辐照损伤等情况,基于电子束返回效应,提出了一种磁场下金属/真空夹层式高能电子屏蔽结构。采用Geant4软件,模拟空间高能电子连续能谱,研究磁场下夹层式结构的高能电子屏蔽性能。此外,建立体素模型,计算射线在人体中的累积剂量,从而评估磁感应强度、屏蔽体材料对屏蔽性能的影响。结果表明:与传统被动屏蔽方式相比,夹层式结构具有电子屏蔽性能高、生成透射次级X射线少的特点;随着磁感应强度增加,体模中累积剂量下降,证明夹层结构的电子屏蔽性能不断提升;Ti/Ti材料组合的屏蔽方式具有更优越的高能电子屏蔽性能。该结构具备较好的高能电子屏蔽性能,将来有望对空间高能电子辐射环境进行有效防护。
[Abstract]:Based on the electron beam return effect, a metal / vacuum sandwich structure for high energy electron shielding under magnetic field is proposed for the possible failure of space equipment caused by high energy electron environment in space and the radiation damage of astronauts. The high energy electron shielding performance of sandwich structure under magnetic field is studied by using Geant4 software to simulate the continuous energy spectrum of high energy electrons in space. In addition, a stereoelement model is built to calculate the cumulative dose of radiation in human body, and then to evaluate the magnetic induction intensity and the effect of shielding material on shielding performance. The results show that, compared with the traditional passive shielding method, the sandwich structure has the characteristics of high electronic shielding performance and less transmission of secondary X-rays. With the increase of magnetic induction intensity, the cumulative dose in the bulk mode decreases, which proves that the electronic shielding performance of sandwich structure is continuously improved, and the shielding mode of Ti/Ti material combination has more superior high energy electron shielding performance. The structure has good high energy electron shielding performance, and it is expected to effectively protect the environment of high energy electron radiation in space in the future.
【作者单位】： 南京航空航天大学核科学与工程系;江苏省核能装备材料工程实验室;
【基金】：南京航空航天大学研究生创新基地开放基金(kfjj20160608,kfjj20170609) 江苏省优势学科建设工程资助项目
【分类号】：TL752
，
本文编号：2387477
[Abstract]:Based on the electron beam return effect, a metal / vacuum sandwich structure for high energy electron shielding under magnetic field is proposed for the possible failure of space equipment caused by high energy electron environment in space and the radiation damage of astronauts. The high energy electron shielding performance of sandwich structure under magnetic field is studied by using Geant4 software to simulate the continuous energy spectrum of high energy electrons in space. In addition, a stereoelement model is built to calculate the cumulative dose of radiation in human body, and then to evaluate the magnetic induction intensity and the effect of shielding material on shielding performance. The results show that, compared with the traditional passive shielding method, the sandwich structure has the characteristics of high electronic shielding performance and less transmission of secondary X-rays. With the increase of magnetic induction intensity, the cumulative dose in the bulk mode decreases, which proves that the electronic shielding performance of sandwich structure is continuously improved, and the shielding mode of Ti/Ti material combination has more superior high energy electron shielding performance. The structure has good high energy electron shielding performance, and it is expected to effectively protect the environment of high energy electron radiation in space in the future.
【作者单位】： 南京航空航天大学核科学与工程系;江苏省核能装备材料工程实验室;
【基金】：南京航空航天大学研究生创新基地开放基金(kfjj20160608,kfjj20170609) 江苏省优势学科建设工程资助项目
【分类号】：TL752
，
本文编号：2387477
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