On the left side of the image is a pair of equal-diameter, horizontal rings, with one labeled proton source and the other labeled anti proton source. The rings look like they are made of a hose; that is, their cross section is circular and they appear hollow. In the proton-source ring blue arrows appear indicating counterclockwise motion inside the hose. In the anti-proton-source ring, red arrows appear indicating clockwise motion inside the hose. A section of hose tangentially leaves each ring to tangentially join another larger ring to the right, which is labeled main ring. Both blue arrows and red arrows appear in the main ring, indicating simultaneous clockwise and counterclockwise motion. From the main ring two tangential hose sections exit to join a similar-sized ring situated beneath the main ring and that is labeled tevatron ring. In the tevatron ring, the blue arrows go half-way around clockwise and the red arrows go half-way around counterclockwise. They meet in a cube labeled collision detector and that has a yellow starburst icon on it.