The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

Answers to Frequently Asked Questions about the APS Upgrade

In May, leaders of the APS Upgrade project announced a new date for the start of the installation period. The APS will shut down for one year, beginning on April 17, 2023, to facilitate the replacement of the original storage ring with a new, state-of-the-art model, and the construction of nine new feature beamlines and 15 beamline enhancements.

The new date is a delay of 10 months from the originally planned start of the installation period and is the result of the COVID-19 pandemic and associated impacts to the project.

As part of the recent APS/CNM Users Meeting, the APS Upgrade project hosted a question-and-answer session to address user questions about the timing and scope of the upgrade, and the benefits of the new storage ring and beamlines. Chief Project Officer Jim Kerby was joined by Jonathan Lang, X-ray Science Division Director, and Susan White De Pace, manager of the APS user programs.

A document of frequently asked questions, including those asked at the Q&A session, has been compiled and is available online. If you have a question you would like to submit, please email as we will periodically update this document with new questions.

The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357.

The U.S. Department of Energy's APS is one of the world’s most productive x-ray light source facilities. Each year, the APS provides high-brightness x-ray beams to a diverse community of more than 5,000 researchers in materials science, chemistry, condensed matter physics, the life and environmental sciences, and applied research. Researchers using the APS produce over 2,000 publications each year detailing impactful discoveries, and solve more vital biological protein structures than users of any other x-ray light source research facility. APS x-rays are ideally suited for explorations of materials and biological structures; elemental distribution; chemical, magnetic, electronic states; and a wide range of technologically important engineering systems from batteries to fuel injector sprays, all of which are the foundations of our nation’s economic, technological, and physical well-being.

Argonne National Laboratory seeks solutions to pressing national problems in science and technology. The nation's first national laboratory, Argonne conducts leading-edge basic and applied scientific research in virtually every scientific discipline. Argonne researchers work closely with researchers from hundreds of companies, universities, and federal, state and municipal agencies to help them solve their specific problems, advance America's scientific leadership and prepare the nation for a better future. With employees from more than 60 nations, Argonne is managed by UChicago Argonne, LLC, for the U.S. DOE Office of Science.

The U.S. Department of Energy's Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit the Office of Science website.


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