Electron Beam on an YAG (IMAGE) American Institute of Physics Caption This is an image of the electron beam produced on an Yttrium-Aluminum-Garnet (YAG) phosphor screen. Credit Sergey Baryshev/Euclid TechLabs Usage Restrictions This image may be used only with appropriate caption and credit. 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.