Author:
Roseker Wojciech,Lee Sooheyong,Walther Michael,Lehmkühler Felix,Hankiewicz Birgit,Rysov Rustam,Hruszkewycz Stephan O.,Stephenson G. Brian,Sutton Mark,Fuoss Paul H.,Sikorski Marcin,Robert Aymeric,Song Sanghoon,Grübel Gerhard
Abstract
AbstractThe ability to deliver two coherent X-ray pulses with precise time-delays ranging from a few femtoseconds to nanoseconds enables critical capabilities of probing ultra-fast phenomena in condensed matter systems at X-ray free electron laser (FEL) sources. Recent progress made in the hard X-ray split-and-delay optics developments now brings a very promising prospect for resolving atomic-scale motions that were not accessible by previous time-resolved techniques. Here, we report on characterizing the spatial and temporal coherence properties of the hard X-ray FEL beam after propagating through split-and-delay optics. Speckle contrast analysis of small-angle scattering measurements from nanoparticles reveals well-preserved transverse coherence of the beam. Measuring intensity fluctuations from successive X-ray pulses also reveals that only single or double temporal modes remain in the transmitted beam, corresponding to nearly Fourier transform limited pulses.
Funder
National Research Foundation of Korea
U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
U.S. Department of Energy
Publisher
Springer Science and Business Media LLC
Cited by
7 articles.
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