Steps Towards Filming Atoms Dancing (image) Elhuyar Fundazioa Caption An electromagnetic field accelerates photoelectrons emitted from neon atoms irradiated by an X-ray free-electron laser. In this way, the X-ray pulse temporal profile and arrival time are uniquely retrieved on a pulse to-pulse basis with femtosecond precision. Credit Jörg Harms/MPSD at CFEL Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.