This photo was taken in the Fermilab Tevatron tunnel. The light blue structures are old Main Ring magnets, and the red structures are Tevatron magnets. The “painted” light remind us of magnetic field lines. This 30-second exposure was taken by setting the camera on a tripod and swinging lights around.
The Tevatron will shut down at the end of September 2011 after 26 years of colliding particles.