太赫兹近场高通量材料物性测试装置直线加速器微波系统研制  

Development of linear accelerator microwave system for terahertz near-field high-throughput material physical property testing system

作　　者：邵琢瑕 张通 董自强 周泽然[3] 何志刚 王琳[1,3] 陆亚林[1,2] Shao Zhuoxia;Zhang Tong;Dong Ziqiang;Zhou Zeran;He Zhigang;Wang Lin;Lu Yalin(Anhui Laboratory of Advanced Photon Science and Technology,University of Science and Technology of China,Hefei 230029,China;Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China;National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)

机构地区：[1]中国科学技术大学先进光子科学技术安徽省实验室,合肥230029 [2]中国科学技术大学微尺度物质科学国家研究中心,合肥230026 [3]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《强激光与粒子束》2025年第1期155-161,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51627901,12405173);科技部国家重点研发计划(2023YFA1610100)。

摘　　要：太赫兹近场高通量材料物性测试系统(NFTHZ)中集成了一台波长可调谐的太赫兹自由电子激光器(THz-FEL),该仪器采用电子能量10~18 MeV可调的直线加速器作为注入器。调节驱动激光的纵向/时间结构,可以形成电子束团的预群聚,通过匹配电子束团的群聚因子、波荡器入口处电子束能量以及波荡器K值之间的关系,能够实现MW级高峰值功率、中心波长0.5~5 THz可调的太赫兹自由电子激光。微波系统为THz-FEL中电子束加速至目标能量提供了高功率微波电场、加速结构以及微波幅度相位控制系统。本文将针对NFTHZ装置微波系统的关键技术以及电子直线加速器的研制进展进行介绍。The terahertz near-field high-throughput material physical property testing system(NFTHZ)integrates a wavelength-tunable terahertz free electron laser(THz-FEL).The instrument uses a linear accelerator with tunable electron energy of 10-18 MeV as the injector.A pre-bunched electron beam can be formed by adjusting the longitudinal/temporal structure of the driving laser.By matching the relationship between the bunching factor,energy of the electron beam at the undulator entrance and the K value of undulator,a terahertz free electron laser with megawatts peak power and an adjustable center wavelength of 0.5-5.0 THz can be achieved.The microwave system provides high-power microwave electric field,accelerating structure and microwave amplitude and phase control system to accelerate the electron beam to the target energy.This article will introduce the development of the microwave system of the NFTHZ facility and the construction progress of the electron linear accelerator.

关 键 词：自由电子激光 太赫兹 预群聚电子束 直线加速器 微波系统 

分 类 号：TN248.6[电子电信—物理电子学]