Measurement of the spatial coherence function of undulator radiation using a phase mask.
نویسندگان
چکیده
A measurement of the horizontal coherence function of 7.9 keV radiation from an undulator beam line at the Advanced Photon Source is reported. X-ray diffraction from a phase-shifting mask was used, and the coherence function was measured as a function of the width of beam-conditioning slits in the beam line. The coherence distribution is found to be best described by a Lorentzian function.
منابع مشابه
Two-dimensional mapping of the asymmetric lateral coherence of thermal light.
We report in this work the first experimental verification of the asymmetric lateral coherence which is a measurement of the spatio-temporal coherence by using a wide-band Young interference experiment with a fixed off-axis slit. We demonstrate the coherence properties through the measurement of the real part of the coherence factor of thermal light. We extend our recent results obtained for be...
متن کاملTwo-photon interferometry
Characterization of x-ray coherence is very important for performing a number of applications based on coherence, as well as for diagnosing high-quality synchrotron sources. Two-photon interferometry originally introduced by Hanbury-Brown and Twiss [1] has a potential to determine spatial and temporal coherence (first-order coherence) and the photon statistics (higher-order coherence) with a ve...
متن کاملMeasuring coherence functions using non-parallel double slits.
We present an experimental method for the fast measurement of both the spectral (spatial) and complex degrees of coherence of an optical field using only a binary amplitude mask and a detector array. We test the method by measuring a two-dimensional spectral degree of coherence function created by a broadband thermal source. The results are compared to those expected by the van Cittert-Zernike ...
متن کاملBRIGHTNESS AND COHERENCE OF SYNCHROTRON RADIATION AND FELs∗
This paper reviews the brightness and coherence properties of radiation from storage rings and free electron lasers (FELs). Starting from the statistical optics and using mutual coherence function of the radiation field, we define the transverse and temporal coherence and modes. Spectral brightness can be represented in radiation phase-space via the Wigner function which is the Fourier transfor...
متن کاملTransverse coherence properties of X-ray beams in third-generation synchrotron radiation sources
This article describes a complete theory of spatial coherence for undulator radiation sources. Current estimations of coherence properties often assume that undulator sources are quasi-homogeneous, like thermal sources, and rely on the application of the van Cittert-Zernike theorem for calculating the degree of transverse coherence. Such assumption is not adequate when treating third generation...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 90 7 شماره
صفحات -
تاریخ انتشار 2003