Site access to Argonne National Laboratory is permitted only with an ID badge or a visitor pass. A visitor pass can be arranged: :.By phone: CARS administrative office at the APS, 630-252-0450, or CARS main office, 773-702-9951 :.By email to: tietz@cars.uchicago.edu.
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, 8:30 a.m.-5:00 p.m. (Central Time). A pass may be left at the Guard House for pick-up during times when the Center 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 for unescorted APS access. Full information on receiving a badge is provided when a new user registers for access.