Gamma-induced positron beam generation at SLEGS  

作　　者：Sheng Jin Zi-Rui Hao Long-Xiang Liu Kai-Jie Chen Yu-Xuan Yang Hang-Hua Xu Yue Zhang Qian-Kun Sun Zhen-Wei Wang Gong-Tao Fan Hong-Wei Wang 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100080,China [3]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [4]ShanghaiTech University,Shanghai 201210,China [5]Zhengzhou University,Zhengzhou 450001,China

出　　处：《Nuclear Science and Techniques》2025年第5期1-10,共10页核技术(英文)

基　　金：supported by the National Key Research and Development program(Nos.2022YFA1602404,2023YFA1606901);the National Natural Science Foundation of China(Nos.12275338,12388102,and U2441221);the Key Laboratory of Nuclear Data foundation(JCKY2022201C152)xm。

摘　　要：Energy-variable gamma-rays are produced in Laser Compton Slant-scattering mode at the Shanghai Laser Electron Gamma Source(SLEGS),a beamline of the Shanghai Synchrotron Radiation Facility(also called Shanghai Light Source).Based on the SLEGS energy-variable gamma-ray beam,a positron generation system composed of a gamma-ray-driven section,positron-generated target,magnet separation section and positron experimental section was designed for SLEGS.Geant4 simulation results show that the energy tunable positron beam in the energy range of 1–12.9 MeV with a flux of 3.7×10^(4)–6.9×10^(5)e^(+)∕s can be produced in this positron generation system.The positron beam generation and separation provide favorable experimental conditions for conducting nondestructive positron testing on SLEGS in the future.The positron generation system is currently under construction and will be completed in 2025.

关 键 词：Shanghai Laser Electron Gamma Source Monte Carlo simulation Nondestructive testing POSITRON GEANT4 

分 类 号：TL99[核科学技术—核技术及应用]