SPEAR3的双缝干涉仪测量
Double-Slit Interferometer Measurements at SPEAR3
摘要：
传统的望远镜用来对可见光同步辐射成像，其分辨率常常受到衍射效应的限制。为了提高分辨率，KEK开发了双缝干涉仪方法，并在世界各地流行起来。基于Van Cittert-Zernike定理，粒子束的尺寸可以通过记录条纹对比度作为干涉仪狭缝间距的函数来推断。在本文中，我们描述了SPEAR 3双缝干涉仪，开发的干涉仪的理论框架，并提供实验结果。值得注意的是，双缝系统围绕射束轴“旋转”以映射光子束相干性对角度的依赖性。
英文摘要：
The resolution of a conventional telescope used to image visible-light synchrotron radiation is often limited by diffraction effects. To improve resolution, the double-slit interferometer method was developed at KEK and has since become popular around the world. Based on the Van Cittert-Zernike theorem relating transverse source profile to transverse spatial coherence, the particle beam size can be inferred by recording fringe contrast as a function of interferometer slit separation. In this paper, we describe the SPEAR3 double-slit interferometer, develop a theoretical framework for the interferometer and provide experimental results. Of note the double-slit system is 'rotated' about the beam axis to map the dependence of photon beam coherence on angle.
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