The Tevatron is a circular particle accelerator in the United States, at the Fermi National Accelerator Laboratory (also known as Fermilab), just east of Batavia, Illinois. 


The 6.86 km circumference ring contains two detectors: CDF for Collider Detector at Fermilab and DZero. In 1995 CDF and DZero experiments announced discovery of the top quark.


The Tevatron ceased operations on 30 September 2011, due to budget cuts and because of the completion of the LHC, which began operations in early 2010 and was more powerful.

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