介绍了上海光源线站工程之一的上海激光电子伽马源(Shanghai Laser Electron Gamma Source,SLEGS)光束线站的建设与试运行情况,在SLEGS装置上可以开展核物理、核天体物理等基础研究、开展伽马辐照、伽马成像及伽马活化等应用研究.SLEGS光束线站在2021年12月通过工艺验收,2022年10月进入到试运行阶段,2023年9月对用户开放运行.SLEGS是国际上首台采用变换碰撞角度连续改变伽马束能量的光束线站,具有最好的能量扫描精度、流强密度以及高效的能量调节能力.试运行阶段SLEGS光束线站重点解决了伽马束能谱和流强的在线监测问题,主要完成了平坦效率谱仪(FED)测量光中子截面的实验方法学研究,以及开展了伽马成像、伽马活化、正电子产生等应用平台的拓展和研究.随着逆康普顿散射技术的发展和应用需求的增加,未来短脉冲、高极化、高通量以及小型化的激光康普顿散射光源将会迎来更好的发展机遇,将在核物理、天体物理、粒子物理、极化物理,以及航空航天、医学检测、能源开发等伽马源应用研究领域发挥重要的作用.
Construction and Trial Operation of Shanghai Laser Electron Gamma Source
This article introduces the construction and trial operation of Shanghai Laser Electron Gamma Source(SLEGS)beamline,one of the Shanghai Synchrotron radiation Facility(SSRF)projects Ⅱ,which can carry out basic research on nucle-ar physics and nuclear astrophysics,and applied research,such as gamma irradiation,gamma imaging and gamma activation.The SLEGS beamline passed the process acceptance in December 2021,entered the trial operation stage in October 2022,and have open to users in September 2023.SLEGS is the first Laser Compton Slant Scattering(LCSS)beamline in the world use the continuous collision angle mode to change the energy of the gamma beam,with the best ability of energy scanning accur-acy,beam intensity and efficient energy regulation.In the trial operation stage,the SLEGS beamline station focused on solv-ing the problem of online monitoring of gamma beam energy spectrum and beam intensity,mainly completed the experiment-al methodology research of photo neutron cross section measurement by Flat Efficiency Detectors(FED),and carried out the expansion and research of application platforms,such as gamma imaging,gamma activation and positron source generation.With the development of inverse Compton scattering techniques,short-pulse,high-polarization,high-intensity and miniatur-ized laser Compton scattering light sources will be in better development opportunities in the future,and will play an import-ant role in nuclear physics,astrophysics,particle physics,polarization physics,as well as aerospace,medical testing,energy development and other gamma source application research fields.
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