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

邵琢瑕; 张通; 董自强; 周泽然; 何志刚; 王琳; 陆亚林

doi:10.11884/HPLPB202537.240168

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

doi: 10.11884/HPLPB202537.240168

邵琢瑕^{1, 2,},
张通^{1, 2},
董自强^{1, 2, ,},
周泽然³,
何志刚³,
王琳^{1, 3},
陆亚林^{1, 2}

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

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

详细信息

作者简介:
邵琢瑕，std@ustc.edu.cn

通讯作者:
董自强，dzq1992@ustc.edu.cn。

中图分类号: TN248.6
计量
- 文章访问数: 49
- HTML全文浏览量: 24
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-15
- 修回日期: 2024-11-29
- 录用日期: 2024-11-22
- 网络出版日期: 2024-12-12

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

Shao Zhuoxia^{1, 2
,},
Zhang Tong^{1, 2},
Dong Ziqiang^{1, 2
, ,},
Zhou Zeran³,
He Zhigang³,
Wang Lin^{1, 3},
Lu Yalin^{1, 2}

1.
Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, Hefei 230029, China
2.
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
3.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

摘要

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。
- 自由电子激光 /
- 太赫兹 /
- 预群聚电子束 /
- 直线加速器 /
- 微波系统
Abstract: 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 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.
- free electron laser /
- terahertz /
- pre-bunched electron beam /
- linear accelerator /
- microwave system

HTML全文

图 1 预聚束太赫兹自由电子激光原理示意图

Figure 1. Schematic of pre-bunched terahertz free electron laser

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图 2 NFTHZ直线加速器微波系统布局图

Figure 2. Microwave system structure of NFTHZ linear accelerator

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图 3 微波功率源子系统

Figure 3. Microwave power source subsystem

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图 4 高功率微波传输系统

Figure 4. High-power microwave transmission system

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图 5 加速结构中的电场分布和加速梯度

Figure 5. Electric field distribution and acceleration gradient of accelerating structure

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图 6 低电平系统

Figure 6. Low-level RF system

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图 7 NFTHZ装置布局图

Figure 7. Layout diagram of NFTHZ

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图 8 电子束测量结果

Figure 8. Measurements of electron beam

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表 1 预聚束THz-FEL技术参数和设计指标

Table 1. Technical parameters and design indicators of the pre-bunched THz-FEL

frequency range/ THz	wavelength range/ µm	electron energy/ MeV	maximum number of electron microbunches	spacing of electron microbunches/ps	peak power of FEL/ MW	FEL frequency range/ THz	FEL frequency range (based on the second harmonic of the electron bunches train repetition rate)/THz
0.5～5	60～600	10～18	16	0.33～2	0.1～7	0.5～3	3～5

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表 2 两种电子能量模式下微波功率测量结果

Table 2. Microwave power measurements in two electron energy conditions

power monitoring location	electron beam energy at 10 MeV/dBm	electron beam energy at 18 MeV/dBm
klystron output	106.31	106.27
klystron reflection	87.65	87.38
E-gun（pickup）	98.43	98.47
E-gun reflection	80.64	79.88
ACT input	100.9	103.91
ACT reflection	85.97	86.77

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