XFELO animation
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- uploaded February 13, 2026
The XFELO cavity is 66 metres long, with diamond mirrors at each end. When an electron bunch passes through the alternating magnetic fields of the undulator, it emits an X-ray pulse. This light pulse is then reflected back to meet the next electron bunch less than half a microsecond later. After just a few iterations, the result is an increasingly sharp X-ray pulse that narrows in on one particular wavelength, much like a laser in the visible spectrum.
(Music: Light Touch by Podington Bear is licensed under a Attribution-NonCommercial 3.0 International License. https://freemusicarchive.org/music/Podington_Bear/Thoughtful/LightTouch)
