Advanced Photon Source

An Office of Science National User Facility

Site Access

Site access to Argonne National Laboratory is permitted only with a proper ID badge or a visitor pass. A visitor pass can be arranged by contacting the MMG administrative assistant (Becki Gagnon) by either phone or e-mail:

The gate pass may be picked up at the Argonne Information Center located just outside the Main Gate Guard House off Cass Avenue. The Center is open M-F, 6:30a.m. -5:00p.m. CST. A pass may be left at the Guard House for pick up during times when the AIC is not open. A site access visitor pass alone does not permit a user unescorted access to the APS facility; either a temporary or permanent Cardkey badge is needed to enter the APS unescorted during off hours.

Gate Hours (all times CST)

Visitors can enter the laboratory at three different points:

  • Main Gate (on Northgate Rd. off Cass Ave.)
    • Map
    • 24 hours a day, 7 days a week
  • Westgate (on Westgate Rd. off Lemont Rd.)
    • Map
    • 6:15 a.m.-7:10 p.m. M-F
  • Eastgate (on Eastwood Dr. off Cass Ave.)
    • 7:00 a.m.-9:00 a.m.
    • 4:00 p.m.-6:00 p.m. M-F