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

Virtual town hall on APSU Polarization Modulation Spectroscopy (POLAR) 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 CT on Friday, November 12. 

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 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 

Published Date