应用于高速条纹相机的行波偏转器设计

为了满足飞秒变像管扫描相机对偏转器的特殊要求，设计了一种应用于高速扫描相机的行波偏转器。根据Finch的行波偏转器设计理论，简化设计流程并利用HFSS软件建立偏转器模型，模拟并求解了行波偏转器的高频信号传播特性和通频带宽，通过电磁波相速度与电子束飞行速度的匹配确定了行波偏转器基本结构参数，并优化设计了一种适合应用于具有10 kV电子能量高速扫描相机的行波偏转器。所设计行波偏转器长度为44 mm，板间距为4 mm，通频带宽为4 GHz，偏转灵敏度为119.8 mm/kV。结合现有的高速扫描相机对此行波偏转器进行了测试实验，测试结果表明，设计结果准确可靠，设计方法得当。该研究为变像管扫描相机的行波偏转器设计提供了有效途径，缩短了高时间分辨扫描相机的研发周期。

Abstract

To meet the special demands on the deflector of femtosecond streak tube camera, a kind of traveling-wave deflector for the high speed streak camera is designed. According to the design theory of traveling-wave deflector proposed by Finch, the design process is simplified and a deflector model is built by using the HFSS software. The high frequency characteristics and the pass bandwidth of the traveling-wave deflector are simulated and solved. The basic structural parameters are determined by matching the electromagnetic wave phase velocity with the electron beam velocity. Through the above method, a traveling-wave deflector is optimally designed for the high speed streak camera with the electron energy of 10 kV. The traveling-wave deflector is designed with the length of 44 mm, the plate spacing of 4 mm, the pass bandwidth of 4 GHz, and the deflection sensitivity of 119.8 mm/kV. The traveling-wave deflector is tested with the existing high-speed streak camera. The test results show that the design results are accurate and reliable, and the design method is proper. The work provides an effective way to design the traveling-wave deflector for the tube camera，and it can shorten the development cycle of high resolution scanning camera.

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宗方轲, 雷保国, 顾礼, 张敬金, 郭宝平, 杨勤劳. 应用于高速条纹相机的行波偏转器设计[J]. 激光与光电子学进展, 2017, 54(4): 043201. Zong Fangke, Lei Baoguo, Gu Li, Zhang Jingjin, Guo Baoping, Yang Qinlao. Design of Traveling-Wave Deflector for High Speed Streak Camera[J]. Laser & Optoelectronics Progress, 2017, 54(4): 043201.

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