同步光空间干涉仪缝距快速扫描系统  

Slit separation rapid scanning system for synchrotron radiation interferometer

作　　者：高波 冷用斌[1,2] 陈汉骄 陈杰 GAO Bo;LENG Yongbin;CHEN Hanjiao;CHEN Jie(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Jiading Campus,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800 [2]中国科学院大学,北京100049

出　　处：《核技术》2018年第8期1-6,共6页Nuclear Techniques

基　　金：国家自然科学基金(No.11375255)资助~~

摘　　要：同步光空间干涉仪技术被广泛应用于国内外各大同步辐射光源的束流横向截面尺寸测量中。在日常使用中空间干涉仪通常采用固定狭缝间距的双缝,测定单一空间频率下的相干度,这种方法在束斑尺寸变化不大的情况下精度较好,分辨率会随束斑尺寸的变化而变化。随着下一代同步辐射光源的发展,精细的束斑尺寸测量需求也越来越迫切,多频点相干度测量精度较高,但是受限于双缝切换的速度。上海光源围绕如何完成快速多频点相干度的测量进行了相关研究,搭建了一套空间干涉仪狭缝间距快速扫描系统。该系统采用双单缝的方式进行缝距快速扫描,并结合多线程的技术实现了快速数据处理。实验结果表明:一次完整的10点测量时间约在3 s,大大提升了多频点相干度测量方法的速度,并且提升了现有固定狭缝间距干涉仪的测量精度。[Background] Spatial interferometer technology is widely used to measure the transverse beam size of synchrotron radiation around the world. The interferometer usually uses double-slit with fixed slit separation. However, this method is only suitable for measurements with relatively small changes in beam size. With the development of the diffraction limited storage ring, the demand for high-precision measurement is becoming more and more urgent. Multi-frequency coherence measurement can overcome these limitations, but it is limited by the changing speed of double-slit. [Purpose] This study aims to improve the speed of multi-frequency coherence measurement by establishment of a slit separation rapid scanning system at Shanghai synchrotron radiation facility（SSRF）. [Methods] Superimposed double single-slit is employed as the new double-slit mask in this system,, and multi-thread technology is used to do fast data processing. [Results] The experimental results show that the time for one complete 10 points measurement is less than 3 s with better accuracy compared with the traditional interferometer. [Conclusion] The new system greatly improves the speed of the multi-frequency coherence measurement and outperform the existing interferometer in terms of accuracy.

关 键 词：同步光空间干涉仪 同步辐射光源 横向截面尺寸 发射度 缝距快速扫描 

分 类 号：TL506.6[核科学技术—核技术及应用]