中国工程物理研究院红外太赫兹自由电子激光装置总体设计  

General Design of Infrared Terahertz Free⁃Electron Laser Facility of Chinese Academy of Engineering Physics

作　　者：周奎[1] 李鹏[1] 胥汉勋 肖德鑫[1] 王建新[1] 罗星[1] 沈旭明[1] 和天慧[1] 陈立均 闫陇刚[1] 王伟俊 徐勇[1] 刘宇[1] 马帅 桑子儒 杨兴繁[1] 吴岱[1] 黎明[1] Zhou Kui;Li Peng;Xu Hanxun;Xiao Dexin;Wang Jianxin;Luo Xing;Shen Xuming;He Tianhui;Chen Lijun;Yan Longgang;Wang Weijun;Xu Yong;Liu Yu;Ma Shuai;Sang Ziru;Yang Xingfan;Wu Dai;Li Ming(Institute of Applied Electronics,Chinese Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《中国激光》2023年第17期215-222,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(62205319);中国工程物理研究院创新发展基金项目(CX20210046)。

摘　　要：中国工程物理研究院红外太赫兹自由电子激光装置是一台用于材料、光谱、生物、医学等领域前沿研究的多功能用户装置,在实验室现有的太赫兹自由电子激光装置(CTFEL)基础上,拟新增两套2×9-cell超导加速单元和两台波荡器,将电子能量提升至最大50 MeV,输出频率覆盖范围拓展至0.1~125 THz,最大宏脉冲功率大于100 W。同时,采用跑道型束线设计,拟建设一台小型能量回收型直线加速器实验研究平台。本文主要介绍了中国工程物理研究院红外太赫兹自由电子激光装置的总体设计、工作模式以及用户实验站布局。Significance Free-electron lasers provide powerful scientific research tools for humans to understand and explore the world.Compared with traditional lasers,free-electron lasers have characteristics such as continuously adjustable wavelength over a significant range,high peak power,narrow bandwidth,and full coherence.They have also been widely used in frontier scientific research fields,such as advanced materials,condensed matter physics,atomic and molecular physics,chemistry,biology,and medicine.In recent years,free-electron laser light sources have rapidly developed.CTFEL is the only high-power terahertz free-electron laser facility driven by a superconducting accelerator in China.However,its capabilities are limited.Currently,the Chinese Academy of Engineering Physics is developing an infrared terahertz free-electron laser facility based on CTFEL.The upgraded facility is a multifunctional user facility for frontier research in the fields of material science,spectroscopy,biology,and medicine.Progress The upgraded facility adopts resonant optical cavity free-electron laser technology.A straight section of the CTFEL with a 320 kV HV-DC photocathode electron gun and a 2×4-cell superconducting accelerator are used as the injector system.The driving laser and photocathode systems are upgraded for compatibility with both GaAs and Cs2Te.The main accelerator system consists of two 2×9-cell superconducting accelerator modules that can increase the electron beam energy to a maximum of 50 MeV.In addition,two new undulators(U48 and U35)are added to expand the free-electron laser frequency coverage from 0.1‒125 THz,and improve the maximum marco-pulse power to over 100 W.The upgraded facility has three different working modes FEL,FLASH,and ERL(Fig.5).In the FEL mode,four electron beam transmission paths pass through four undulators to generate FEL radiation in different frequency bands.Notably,the electron beams can choose only one path for transmission.In the FLASH mode,after passing through the main accelerator and the

关 键 词：激光器 自由电子激光 红外太赫兹 超导加速器 波荡器 能量回收型直线加速器 

分 类 号：TN248[电子电信—物理电子学]