Spatial and temporal coherence properties of single free-electron laser pulses.

@article{Singer2012SpatialAT,
  title={Spatial and temporal coherence properties of single free-electron laser pulses.},
  author={Andrej Singer and Florian Sorgenfrei and Adrian P. Mancuso and Natalia Gerasimova and Oleksandr M. Yefanov and Johannes Gulden and Thomas Gorniak and Tobias Senkbeil and Anne E. Sakdinawat and Y. Liu and D Attwood and Siarhei Dziarzhytski and Dong-Du Mai and Rolf Treusch and Edgar Weckert and Tim Salditt and Axel Rosenhahn and W. Wurth and Ivan A. Vartanyants},
  journal={Optics express},
  year={2012},
  volume={20 16},
  pages={
          17480-95
        }
}
The experimental characterization of the spatial and temporal coherence properties of the free-electron laser in Hamburg (FLASH) at a wavelength of 8.0 nm is presented. Double pinhole diffraction patterns of single femtosecond pulses focused to a size of about 10×10 μm(2) were measured. A transverse coherence length of 6.2 ± 0.9 μm in the horizontal and 8.7 ± 1.0 μm in the vertical direction was determined from the most coherent pulses. Using a split and delay unit the coherence time of the… 
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