  At the end of its operations in 2011, the Fermilab antiproton production
complex consisted of a sophisticated target system, three 8-GeV storage rings
(namely the Debuncher, the Accumulator and the Recycler), 25 independent
multi-GHz stochastic cooling systems, the world's only relativistic electron
cooling system and a team of technical experts equal to none. The accelerator
complex at Fermilab supported a broad physics program including the Tevatron
Collider Run II, neutrino experiments using 8-GeV and 120-GeV proton beams, as
well as a test beam facility and other fixed target experiments using 120-GeV
primary proton beams. This paper provides a brief description of Fermilab
accelerators as they operated at the end of the Collider Run II (2011).
