Takayama Y, Kamada S
KEK, 1-1 Oho, Tsukuba-shi, Ibaraki 305-0801, Japan.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Jun;59(6):7128-40. doi: 10.1103/physreve.59.7128.
In this paper we discuss how the first-order spatial coherence of bending magnet radiation is determined. We present an analytical representation of the coherence and compare it with the numerical calculations based on the first principles. It is shown that if the electron-beam size is so large that some conditions are satisfied, the van Cittert-Zernike theorem can be used without any modification in the vertical and horizontal directions. The formalism presented will be useful in judging whether or not the electron-beam size in the storage ring can be estimated directly from the van Cittert-Zernike theorem using the synchrotron radiation interferometer.
在本文中，我们讨论了如何确定弯曲磁铁辐射的一阶空间相干性。我们给出了相干性的解析表达式，并将其与基于第一原理的数值计算结果进行了比较。结果表明，如果电子束尺寸足够大且满足某些条件，则在垂直和水平方向上可以直接使用范西特-泽尼克定理而无需任何修正。所提出的形式体系将有助于判断是否可以使用同步辐射干涉仪根据范西特-泽尼克定理直接估算储存环中的电子束尺寸。
