Advanced Photon Source

An Office of Science National 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
Information for Users
Floor Coordinator on Duty
  • 630-252-0101 (on-call pager)
  • From on-site phone: 2-0101
General Inquiries & Media Contact
Important Numbers
  • Off-hour access: 630-252-0101
  • Safety concerns: 630-252-1811
  • Emergencies: 630-252-1911
Mailing Address
  • Advanced Photon Source
  • Argonne National Laboratory
  • 9700 S. Cass Avenue
  • Building 401
  • Lemont, IL 60439
  • 630-252-2000



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