Wigner distribution measurements of the spatial coherence properties of the free-electron laser FLASH.
نویسندگان
چکیده
The four-dimensional Wigner distribution function is determined from intensity profiles measured in the focused photon beam of FLASH (Free-electron laser in Hamburg) for a variety of photon beamline settings. The Wigner formalism results in comprehensive coherence information without the requirement of simplifying assumptions on the beam. The entire four-dimensional spatial mutual coherence function, horizontal and vertical coherence lengths and the global degree of coherence are derived and compared to Young's double pinhole measurements [Opt. Express 20, 17480 (2012)].
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ورودعنوان ژورنال:
- Optics express
دوره 22 13 شماره
صفحات -
تاریخ انتشار 2014