pulsed beam of X-rays (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption A pulsed beam of X-rays is incident on a diamond mask (blue), creating a grating of excitation on the sample. A laser beam (thin blue line on the right) is diffracted by the transient grating in the sample, and the diffracted beam (yellow line) is recorded as a function of time, with respect to the initial X-ray beam pulse. Credit Ella Maru Studio (https://scientific-illustrations.com) Usage Restrictions Media purposes only. Commercial usage restricted; by permission only. 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.