摘要：束流收集器是加速器末端吸收高能粒子束的主要部件。本文针对中国工程物理研究院正在研制的自由电子激光相干强太赫兹源(fel-thz)装置8 MV/5mA准连续电子束设计束流收集器,其内表面吸收平均功率达40kW。通过对收集器结构优化和四级磁铁对电子束扩束,将收集器长度控制在1.2m以内。优化收集器水冷结构及水流速度,使收集器的温度控制在355 K,满足高平均功率fel-thz装置的使用要求。

摘要：基于汤姆逊背散射的激光丝扫描(LW)方法作为无阻拦电子横向尺寸测量手段,近年来广泛应用于高能对撞机和能量回收环直线加速器。为在连续模式下测量高平均功率相干强太赫兹源的直流光阴极电子枪(DC-gun)电子束横向束斑,本文提出了一种基于驱动激光器分束的高重复频率,较低脉冲功率的新型LW系统。通过理论及模拟分析,证明该系统相对于常规LW系统具有成本低、精度高、探测时间短、对电子束影响小的优势,并给出了用于自由电子激光太赫兹(fel-thz)装置DC-gun出口电子束LW系统的实验设计。

摘要：The laser wire （LW） method has been demonstrated to be an effective non-interceptive technique for measuring transverse profile and emittance of electron beams in colliders, storage rings and dumping rings. In this paper, we present an improved design of high repetition LW system for high average power free electron lasers （HAP fels） and energy recovery linacs （ERLs）. This improved LW utilizes the excess power of the photocathode drive laser, thus making itself much cheaper and simpler. The system main parameters are optimized with numerical calculations and Monte Carlo simulations, indicating that resolutions would be better than 100 ~m and scanning time less than 1 minute. Status of the experiment preparation is also presented.