X光大动态条纹变像管优化设计与评价  

Optimization Design and Calibration of a High Dynamic Range X-Ray Streak Camera

作　　者：李涛[1,2] 徐向晏[1] 曹希斌[1] 田进寿[1] 温文龙[1] 刘虎林[1] 邹玮[1] 董改云[1] 王俊锋[1] 王超[1] 张铁[1] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《光学学报》2013年第F06期123-128,共6页Acta Optica Sinica

基　　金：国家自然科学基金（60901036）资助课题.

摘　　要：优化设计了一种大动态范围的X光条纹变像管。该管采用圆筒型电极结构，通过提高加速电压和优化电子光学系统来减小空间电荷效应的影响，并使用调制传递函数模拟了高压电子光学系统的时空特性。采用Au阴极和大动态微通道板（MCP），以进一步扩大条纹变像管动态范围。采用Nd：YLF激光器平台和动态扫描电路对条纹变像管的性能进行了实验评价，激光器输出光脉冲宽度为8ps，动态测试结果显示，该条纹变像管动态范围高于1000，时间分辨率优于14ps，动态空间分辨率优于15lp／mm。实验结果表明，该变像管性能达到设计要求，可基本满足超快诊断的需求，同时表明优化方向和设计方案是正确的。A kind of cylinder-type electrode and high dynamic range X-ray streak camera has been optimally designed and developed. By improving the accelerating field, optimizing electronic optical system, the spatial and temporal characteristics of the electronic optical system is obtained with the modulation transfer function （MTF）. By using the gold cathode （Au） and the large dynamic microchannel plate （MCP）, the streak tube＇s dynamic range is further enlarged. Experimental test is carried out by Nd： YLF laser （8 ps） and dynamic scanning circuit, and the results show that the dynamic range is more than 1000, the time resolution is less than 14 ps, and the dynamic spatial resolution is over the 15 lp/mm. This indicates that the performance of the streak tube receches the design requirements and meet the demand of the ultrafast diagnostics. Meanwhile, the optimization direction and the program design is correct.

关 键 词：X射线光学 X光条纹变像管 动态范围 时间分辨率 动态空间分辨率 

分 类 号：O463[机械工程—光学工程] TB872[理学—电子物理学]