The Accelerator Test Facility (ATF) is the DOE Office of Science User Facility for the Accelerator Stewardship Program. It provides users with high brightness electron beams, near-infrared (NIR) and long-wave infrared (LWIR) laser beams, and an ultrafast electron diffraction (UED) facility. User proposals are reviewed by the ATF Program Advisory Committee and meritorious proposals that advance the science or technology of accelerators and lasers are granted beam time.

The ATF pioneered the concept of a user facility studying properties of modern accelerators and new techniques of particle acceleration. Its role continues to evolve as a valuable resource to the advanced accelerator and laser user community. Collaborating with over 20 different institutions over its lifetime, ATF has close ties with national and international universities, laboratories and small businesses.

The Accelerator Test Facility is a member of the Society for Science at User Research Facilities (SSURF), which represents the interests of all users who conduct research at U.S. national scientific user facilities, as well as scientists from U.S. universities, laboratories, and industry who use similar facilities outside the United States.