Fermilab's legendary atom-smasher is shut down
It was the end of an era as the Tevatron accelerator was shut down Friday afternoon at Fermilab in Batavia. The once most powerful accelerator in the world had its title usurped by the Large Hadron Collider in Europe in 2009. And when the laboratory couldn't get enough U.S. money to keep running the Tevatron a few more years as well as build new experiments, lab officials decided to focus on the future.
Circumference: The main ring is 4 miles around.
Depth: The tunnel is 25 feet below grade. There is a berm on top.
Temperature: The cable inside the superconducting magnets is cooled to -450 degrees Fahrenheit.
What's in it: A lot of stuff, but the stars are the 1,000 superconducting magnets that conduct electrical current without resistance. That extra strength enables acceleration to a higher energy.
Energy: 1.8 trillion volts.
Particle detectors: Two, the DZero and CDF. Each weighs about 5,000 pounds.
Initial cost: $120 million when completed in 1983 -- but lab officials point out it built on existing facilities, and would have cost more to build from scratch.
SOURCE: Fermi National Accelerator Laboratory