LCLS Measures 100 to 400 Attosecond Hard X-ray Pulses
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In October 2026, the LCLS research team at SLAC measured hard X-ray pulses with photon energies of about 9 keV and durations of 100 to 400 attoseconds; the results were published in Nature Photonics. The team focused part of the beam onto a 150 nm wide spot on a copper foil to generate amplified spontaneous emission, then combined the energy and spectral shape of the other part of the beam to calculate the pulse duration. Such pulses can be used to probe fast processes in dense plasmas and help enable measurements before X-rays cause electronic-state damage.
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- Phys.org Optics & PhotonicsPicksLCLS Measures Hard X-Ray Pulses of About 9 keV and 100 to 400 Attoseconds
A research team at SLAC's LCLS measured hard X-ray pulses with photon energies of about 9 keV and durations of 100 to 400 attoseconds, with results published in Nature Photonics. The team focused part of the beam to a 150 nm wide spot on a copper foil to generate amplified spontaneous emission, then combined the energy and spectral shape of the other part of the beam to calculate the pulse duration. Such pulses can be used to probe rapid processes in dense plasmas and to help make measurements before X-rays cause electronic-state damage.
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