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Comparing the spatial coherence of the natural and focused X-rays from a free electron laser

Title
Comparing the spatial coherence of the natural and focused X-rays from a free electron laser
Authors
Cho, DohyungYang, JiseokNam, DaewoongKim, SangsooKim, SunamPark, JaehyunTono, KensukeYabashi, MakinaIshikawa, TetsuyaSONG, CHANGYONG
Date Issued
8-Jul-2019
Publisher
OPTICAL SOC AMER
Abstract
The degree of spatial coherence, as basic characteristics of the radiation, becomes an important guide to evaluate the performance of X-rays from newly introduced advanced light sources including the X-ray free electron laser (XFEL). Often the modification of the Xray wavefronts to fulfill various applications is necessary, but also there is the need to preserve its coherence property. However, experimental investigation directly comparing the coherence property of focused X-ray radiations with the unmodified ones has not been available. We have performed Young's double-slit experiments by recording diffraction patterns both from slit apertures for unfocused XFEL radiation and from pairs of Au nanoparticles for one-micron focused XFEL radiations. The results confirm that the degree of spatial coherence is preserved for well-built K-B focusing mirrors. (c) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords
RADIATION
URI
http://oasis.postech.ac.kr/handle/2014.oak/99358
ISSN
1094-4087
Article Type
Article
Citation
OPTICS EXPRESS, vol. 27, no. 14, page. 19573 - 19582, 2019-07-08
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