Researchers at the Linac Coherent Light Source (LCLS) at the U. S. Department of Energy's SLAC National Accelerator Laboratory have measured the shortest high-energy X-ray pulses ever recorded at an X-ray free-electron laser (XFEL).

Source: [Phys.org](https://phys.org/news/2026-10-ray-free-electron-laser-shortest.html)

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