FEL装置中束流位置测量系统的设计及THz驱动条纹相机的相关研究

发布时间：2023-12-28 18:05

　　束流诊断系统是粒子加速器调试和稳定运行的重要基础,常被称作加速器的“眼睛”和“耳朵”。在加速器中,需要测量的束流参数主要包括束流强度、横向位置、横向尺寸、纵向长度、能量等。近年来,针对自由电子激光、衍射极限储存环以及小型化的加速器概念(如太赫兹驱动加速等)的研究引起了广泛关注,新装置的建设往往伴随着对束测系统的特定要求。任何一个加速器装置都需要综合自身的束流特性、测量需求以及预算成本等设计最优化的束测系统。本文主要分为两个部分:针对国家同步辐射实验室的红外自由电子激光(IR-FEL)项目中束流位置探测器(BPM)系统的设计研究;基于太赫兹(THz)驱动条纹相机中关键部件——THz谐振器的设计优化,拟达到飞秒(fs)量级的束团长度测量分辨率。IR-FEL装置中束流位置测量系统的设计近几年,国家同步辐射实验室新建了一个紧凑型的IR-FEL装置,用于提供波长范围覆盖远红外到中红外的连续可调谐激光。该装置的微脉冲重复频率在476 MHz、238 MHz、119 MHz、59.5 MHz间可调,要求达到好于50 μm的宏脉冲位置分辨率。考虑到装置对分辨率没有太高的要求,我们选用机械结构最简单、成...

【文章页数】：182 页

【学位级别】：博士

【文章目录】：
英文部分
    Abstract
    List of Abbreviations and Symbols
    1 Introduction
        1.1 Particle accelerators
        1.2 Beam diagnostics in particle accelerators
            1.2.1 Main beam parameters
            1.2.2 Beam position monitors
            1.2.3 Bunch length measurement
        1.3 Outline the dissertation
    2 Introduction to BPM and THz driven deflector based streak camera
        2.1 beam position monitors
            2.1.1 Button BPM
            2.1.2 Stripline BPM
            2.1.3 Cavity BPM
            2.1.4 Resonant stripline BPM
        2.2 THz driven deflector based streak camera
            2.2.1 The motivation of developing THz driven streak camera
            2.2.2 Recent progress on THz driven streak camera
    3 BPM system for the IR-FEL project
        3.1 Design of the BPM system
            3.1.1 Button BPM
            3.1.2 Resonant stripline BPM
            3.1.3 electronics system
            3.1.4 Evaluation of position resolution
        3.2 Laboratory tests of BPM prototypes
            3.2.1 Button BPM
            3.2.2 Resonant stripline BPM
        3.3 Online measurement with button BPM
        3.4 Summary
    4 THz driven deflector based streak camera
        4.1 Three potential designs of THz deflector
            4.1.1 ISRR
            4.1.2 ISRR array
            4.1.3 Dielectric tube
            4.1.4 Comparison between these three THz deflectors
        4.2 THz streaking experiment for 35MeV electron beam with ISRR structure
            4.2.1 Simulation results
            4.2.2 Experiment results and discussion
            4.2.3 Conclusion
        4.3 Analysis of multipole fields
            4.3.1 ISRR and ISRR array structures
            4.3.2 Dielectric tube structure
            4.3.3 Comparison between these three THz deflectors
        4.4 Optimization of these three THz deflectors
            4.4.1 Optimization of ISRR
            4.4.2 Optimization of ISRR array
            4.4.3 Optimization of Dielectric tube
            4.4.4 Conclusion
        4.5 Summary
    5 Conclusion
    Bibliography
    Acknowledgements
    Publications
    Participated research projects
中文部分
    中文摘要
    第一部分 绪论
    第二部分 红外自由电子激光装置中束流位置测量系统的设计
    第三部分 太赫兹驱动条纹相机的相关研究
    第四部分 总结



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