Skopintsev P, Singer A, Bach J, Müller L, Beyersdorff B, Schleitzer S, Gorobtsov O, Shabalin A, Kurta R P, Dzhigaev D, Yefanov O M, Glaser L, Sakdinawat A, Grübel G, Frömter R, Oepen H P, Viefhaus J, Vartanyants I A
Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany.
Universität Hamburg, Institut für Angewandte Physik, D-20355 Hamburg, Germany.
J Synchrotron Radiat. 2014 Jul;21(Pt 4):722-8. doi: 10.1107/S1600577514006857. Epub 2014 May 13.
A method to characterize the spatial coherence of soft X-ray radiation from a single diffraction pattern is presented. The technique is based on scattering from non-redundant arrays (NRAs) of slits and records the degree of spatial coherence at several relative separations from 1 to 15 µm, simultaneously. Using NRAs the spatial coherence of the X-ray beam at the XUV X-ray beamline P04 of the PETRA III synchrotron storage ring was measured as a function of different beam parameters. To verify the results obtained with the NRAs, additional Young's double-pinhole experiments were conducted and showed good agreement.
本文提出了一种从单个衍射图样表征软X射线辐射空间相干性的方法。该技术基于从非冗余狭缝阵列（NRA）的散射，并同时记录在1至15 µm的几个相对间距处的空间相干度。利用NRA，测量了PETRA III同步加速器储存环的XUV X射线束线P04处X射线束的空间相干性随不同束参数的变化。为了验证用NRA获得的结果，还进行了额外的杨氏双针孔实验，结果显示吻合良好。
