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...injection system for the Tevatron, accelerating particles to 150 GeV and then transferring them to the new superconducting ring for acceleration to 900 GeV. In 1987 the Tevatron began operation as a proton-antiproton collider—with 900-GeV protons striking 900-GeV antiprotons to provide total collision energies of 1.8 teraelectron volts (TeV; 1.8 trillion electron volts). The original main...
...then became the principal machine for providing extracted beams, at the lower energy of 120 GeV but at much higher intensities than the Tevatron provided. In 1987 the Tevatron began to operate as a proton-antiproton collider, and this was its sole function from 2000 until it closed in 2011.
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