Statistical properties of a free-electron laser revealed by Hanbury Brown-Twiss interferometry

@article{Gorobtsov2017StatisticalPO,
  title={Statistical properties of a free-electron laser revealed by Hanbury Brown-Twiss interferometry},
  author={Oleg Yu Gorobtsov and Giuseppe Mercurio and G{\"u}nter Brenner and Ulf Lorenz and Natalia Gerasimova and Ruslan P Kurta and Florian Hieke and Petr Skopintsev and Ivan A. Zaluzhnyy and Sergey Lazarev and Dmitry Dzhigaev and Max Rose and Andrej Singer and W. Wurth and Ivan A. Vartanyants},
  journal={Physical Review A},
  year={2017},
  volume={95},
  pages={023843}
}
We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission (SASE) free-electron laser (FEL) FLASH at DESY in Hamburg by means of Hanbury Brown and Twiss (HBT) interferometry. The experiments were performed at the FEL wavelengths of 5.5 nm, 13.4 nm, and 20.8 nm. We determined the 2-nd order intensity correlation function for all wavelengths and different operation conditions of FLASH. In all experiments a high degree of spatial coherence… 

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