Tevatron's a circular particle accelerator at the Fermi National Accelerator Laboratory in Batavia, Illinois and remains the highest energy particle collider in the world until collisions begin at the Large Hadron Collider (LHC). The Tevatron's a synchrotron that accelerates protons and antiprotons in a 6.28 km (3.90 miles) ring to energies of up to 1 TeV, hence the name. The Tevatron was completed in 1983 at a cost of $120 million and has been regularly upgraded since then. The Main Injector w… (More on Tevatron)