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


User Contact Information
User Administration

Contacts for user-related administrative questions.

Floor Coordinators (User ESH Support)

Contacts for operational and safety support for users.

Safety Staff

Contacts for specific safety concerns, e.g., hazardous or radioactive materials, chemical exposure, electrical safety, hoisting and rigging.

Beamline Directory

Directory of beamlines, with links to data pages giving technical and contact details.

Sectors Directory

Sector building numbers, direct telephone numbers for beamline work areas, and associated XSD groups/CATs. 

APS Building Managers
APS Contact Information
User Inquiries: For all issues related to user access, proposals, etc.
General Inquiries about the APS (for user-related questions, see above)
Floor Coordinator on Duty
  • 630-252-0101 (on-call pager)
  • From on-site phone: 2-0101
Main Control Room
  • 630-252-9424
Safety Manager
Building Managers
Media Contact
Mailing Address

Advanced Photon Source
Argonne National Laboratory
9700 S. Cass Avenue, Building 401, Rm. A4113
Lemont, IL 60439

To comment on the contents, please contact or 630-252-9090.