Proton Synchrotron
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The Proton Synchrotron (PS) was the first major particle accelerator at CERN, built as a 28 GeV proton accelerator in 1959. It takes the protons from the Proton Synchrotron Booster at 1.4GeV. It was reused as the initial accelerator for the Intersecting Storage Rings and Super Proton Synchrotron, and will be reused in the same capacity for the Large Hadron Collider.
The PS machine is circular with a circumference of about 600 meters. It is a versatile machine which is (or has been) used for accelerating antiprotons, protons, electrons, positrons and ions.