为研究电子束转轫致辐射的特性,采用FLUKA蒙特卡罗程序,研究了7.5 Me V电子束透过Cu、Ag、W、Ta、Water靶的电子、轫致辐射光子的特性,得到了利用轫致辐射进行辐照时的最佳靶厚度,以及在最佳靶厚度情况下的透射轫致辐射的能量密度分布...为研究电子束转轫致辐射的特性,采用FLUKA蒙特卡罗程序,研究了7.5 Me V电子束透过Cu、Ag、W、Ta、Water靶的电子、轫致辐射光子的特性,得到了利用轫致辐射进行辐照时的最佳靶厚度,以及在最佳靶厚度情况下的透射轫致辐射的能量密度分布。同时对不同束流扫宽情况下的能量利用率进行了初步探讨。本研究对7.5 Me V电子束转轫致辐射的靶设计及其辐射加工产业具有一定的理论指导意义。展开更多
The energy response calibration of the commonly used high pressure ionization chamber is very difficult to obtain when the gamma-ray energy is more than 3 MeV. In order to get the calibration of the higher part of the...The energy response calibration of the commonly used high pressure ionization chamber is very difficult to obtain when the gamma-ray energy is more than 3 MeV. In order to get the calibration of the higher part of the high pressure ionization chamber, we use the Fluka Monte Carlo program to perform the energy response in both the spherical and the cylindrical high pressure ionization chamber which are full of argon gas. The results compared with prior study when the gamma-ray energy is less than 1.25 MeV. Our result of Monte Carlo calculation shows agreement with those obtained by measurement within the uncertainty of the respective methods. The calculation of this study is significant for the high pressure ionization chamber to measure the high energy gamma-ray.展开更多
文摘上海光源(Shanghai Synchrotron Radiation Facility,简称SSRF)是一个由国家投资建造的第三代同步辐射光源装置,由150MeV电子直线加速器、3.SGeV增强器和3.5GeV的储存环及同步辐射实验线站组成。SSRF在运行时,电子在增强器和储存环中产生大量同步辐射。同时,电子与真空管壁等发生相互作用产生轫致辐射和中子。SSRF固定辐射监测系统用于监测SSRF运行期间在主体建筑四周与环境中产生的辐射剂量水平。系统由探测器、智能模块、监控及管理计算机组成。该系统数据采集控制将基于EPICS(Experimental Physics and Industrial Control System)进行开发,搭建了收集多台前端智能模块数据,并进行处理、分析的软件系统。文中介绍该系统各组成部分的特点和工作原理,以及监控软件、分析软件所实现的具体功能。
文摘为研究电子束转轫致辐射的特性,采用FLUKA蒙特卡罗程序,研究了7.5 Me V电子束透过Cu、Ag、W、Ta、Water靶的电子、轫致辐射光子的特性,得到了利用轫致辐射进行辐照时的最佳靶厚度,以及在最佳靶厚度情况下的透射轫致辐射的能量密度分布。同时对不同束流扫宽情况下的能量利用率进行了初步探讨。本研究对7.5 Me V电子束转轫致辐射的靶设计及其辐射加工产业具有一定的理论指导意义。
文摘The energy response calibration of the commonly used high pressure ionization chamber is very difficult to obtain when the gamma-ray energy is more than 3 MeV. In order to get the calibration of the higher part of the high pressure ionization chamber, we use the Fluka Monte Carlo program to perform the energy response in both the spherical and the cylindrical high pressure ionization chamber which are full of argon gas. The results compared with prior study when the gamma-ray energy is less than 1.25 MeV. Our result of Monte Carlo calculation shows agreement with those obtained by measurement within the uncertainty of the respective methods. The calculation of this study is significant for the high pressure ionization chamber to measure the high energy gamma-ray.
