NewScienceSLAC Records 100-Attosecond Hard X-Ray PulsesKey TakeawaysLCLS measured hard X-ray pulses lasting 100 to 400 attoseconds.The pulses carried photon energies of about 9 keV.An amplified-spontaneous-emission method verified the pulse duration.DEDT Editorial Team·Oct 21, 2026·via phys.orgMore in Science→
