Alternating Gradient Synchrotron
The Alternating Gradient Synchrotron (AGS) is a particle accelerator located at the Brookhaven National Laboratory in Long Island, New York, United States. The Alternating Gradient Synchrotron was built on the innovative concept of the alternating gradient, or strong-focusing principle, developed by Brookhaven physicists.
Source: Wikipedia — Alternating Gradient Synchrotron (CC BY-SA 4.0)