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

Virtual Town Hall on APS-U Polarization Modulation Spectroscopy Construction at 4-ID

The Advanced Photon Source will hold a virtual town hall for users interested in the project to construct the Polarization Modulation Spectroscopy (POLAR) feature beamline at 4-ID. The town hall runs from 10 a.m. to noon CDT on Friday, November 12, 2021. 

Presentations at the town hall will cover the timing and scope of the POLAR construction, and the new capabilities that will be available to users after the APS Upgrade (APS-U) Project is complete.  There will be a Q&A session to field any questions from town hall attendees. 

Please register for the virtual town hall by sending an email message to including your name, affiliation, citizenship, and email address. Please include “POLAR Town Hall” in the subject line of your email. You will receive an email response that includes the final agenda and a link to use to connect to the meeting. Registration deadline is November 5.  




Jonathan Lang: Welcome and APS-U overview 



Daniel Haskel: APS-U 4-ID Scope, beamline layout, timelines



Joerg Strempfer: APS-U 4-ID Optics, end station instrumentation 



Yongseong Choi, Gilberto Fabbris, Joerg Strempfer, Daniel Haskel: Q&A with beamline staff  


The Advanced Photon Source is a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. 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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