Advanced Photon Source (IMAGE) DOE/Argonne National Laboratory Caption The Advanced Photon Source (APS) at Argonne is the nation's highest-energy X-ray source, used for everything from fundamental physics to pinpointing defects in materials. Participants in the Chain Reaction Innovations program will receive guidance from Argonne staff on how to use Argonne's various R&D tools, including the APS. Credit Argonne National Laboratory 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.