Ultrafast Surface X-Ray Probe (IMAGE) DOE/Argonne National Laboratory Caption This image shows the experimental setup for a newly developed technique: ultrafast surface X-ray scattering. This technique couples an optical pump with an X-ray free-electron laser probe to investigate molecular dynamics on the femtosecond time scale. Credit Image by Haidan Wen Usage Restrictions None License Licensed content 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.