APS Users: Please note that Argonne National Laboratory (ANL), including the APS User Office, is closed for a winter break from COB Friday, December 20, 2024, through Wednesday, January 1, 2025. 

ANL will resume operations on Thursday, January 2 at 8:00 am Chicago time and the User Office will respond to all inquiries at that time. 

DOSIMETRY IS REQUIRED FOR ACCESS TO THE EXPERIMENT HALL FLOOR: Dosimetry Information for APS

PLEASE NOTE: When completing GERT, you will have two attempts to complete the exam. After the two unsuccessful attempts, please stop and contact Angel Garcia (agarcia@anl.gov) or Morgan Weckbacher (mweckbacherrobeck@anl.gov) to request a third attempt or receive remediation training before another attempt.

New resource for users! Returning to the APS

User Checklist A useful, step-by-step guide for users!

REAL ID NOW REQUIRED for site access to Argonne.

The APS Users' Executive Committee (UEC) is an elected advocacy group for the APS user community. To reach out to your advocates with questions/concerns/feedback/ideas/problems, please click here.

NOTIFICATION TO USERS on publicly disseminated user data

APS User Office, Bldg. 401, Room B1100
Hours: 8:00 a.m. - 4:30 p.m., Monday-Friday