# X-ray free-electron laser sets new record for shortest high-energy pulses

- Source: Phys.org
- Published: 2026-10-21T18:40:10+00:00
- Category: Science
- Original: https://phys.org/news/2026-10-ray-free-electron-laser-shortest.html
- Canonical: https://groundlevelnews.com/story/x-ray-free-electron-laser-sets-new-record-for-shortest-high-energy-pul-88e7cb/

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). The pulses had photon energies of about 9 kiloelectronvolts (keV) and clocked in at durations of 100 to 400 attoseconds—mere billionths of a billionth of a second. The

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