The Advanced Photon Source (APS)

THE APS UPGRADE: BUILDING A BRIGHTER FUTURE

The future of the Advanced Photon Source is about to get brighter. The APS is undergoing a massive upgrade that will replace the current electron storage ring with a new, more powerful model.

THE APS UPGRADE: BUILDING A BRIGHTER FUTURE

The future of the Advanced Photon Source is about to get brighter. The APS is undergoing a massive upgrade that will replace the current electron storage ring with a new, more powerful model.

THE APS UPGRADE: BUILDING A BRIGHTER FUTURE

The future of the Advanced Photon Source is about to get brighter. The APS is undergoing a massive upgrade that will replace the current electron storage ring with a new, more powerful model.

THE APS UPGRADE IS NOW COMPLETE

The Advanced Photon Source Upgrade project received its final approval in January 2026, having delivered on its full scope on budget and ahead of schedule. The upgraded facility is now fully operational and user experiments are underway. This page will no longer be updated, and the latest information on scientific results will be posted to the APS home page. The weekly updates to the beamline progress chart will be linked from the APS home page as well.

Featured Photo

Users Junyoung Kwon and Jimin Kwak, center, with Argonne physicists Mary Upton, left, and Jung Ho Kim, right, at the newly upgraded beamline 27-ID. Image by Mark Lopez, Argonne National Laboratory.

Click here to see more photos from the APS Upgrade.