Proton Synchrotron

This article is about the particle accelerator at CERN. For proton synchrotrons in general, see Synchrotron.

The surface above the PS at CERN. After more than 55 years, the ring-shaped accelerator is hardly visible due to later constructions. However it can still be seen as a raised area in the lower left part of the photo.

The Proton Synchrotron (PS) is the oldest major particle accelerator at CERN, built as a 28 GeV proton accelerator in the late 1950s and put into operation in 1959. It takes the protons from the Proton Synchrotron Booster at a kinetic energy of 1.4 GeV and lead ions from the Low Energy Ion Ring (LEIR) at 72 MeV per nucleon. It has been operated as an injector for the Intersecting Storage Rings (ISR), the Super Proton Synchrotron (SPS) and the Large Electron-Positron Collider (LEP). The accelerator is part of the Large Hadron Collider (LHC) injector chain, accelerating protons and heavy ions.

It has also been used as a particle source for other experiments, such as the Gargamelle bubble chamber for which it supplied a neutrino beam. This led to the discovery of the weak neutral current in 1974.

The PS machine is a circular accelerator with a circumference of 628.3 m. It is a versatile machine having accelerated protons, antiprotons, electrons, positrons and species of ions. Major upgrades have improved its performance by more than a factor of 1000 since 1959. The only significant components remaining from its original installation some 50 years ago are the bending magnets and the buildings.

European Organization for Nuclear Research (CERN)

Large Hadron Collider

LHC	List of LHC experiments ALICE ATLAS CASTOR CMS FP420 HV-QF LHCb LHCf MoEDAL TOTEM

Large Electron–Positron Collider

LEP	List of LEP experiments ALEPH DELPHI OPAL L3 LEP5 LEP6

Super Proton Synchrotron

SPS	List of SPS experiments CNGS NA48 NA49 NA58/COMPASS NA60 NA61/SHINE NA62 UA1 UA2

Proton Synchrotron

PS	AD Proton Synchrotron Booster AIDA DIRAC ELENA ISOLDE ISOLTRAP MISTRAL WITCH

Linear Accelerators

CTF3
LINAC
LINAC 2
LINAC 3
LINAC 4

Others Accelerators & Experiments

Future projects

Coordinates: 46°13′55″N 6°02′55″E / 46.23194°N 6.04861°E / 46.23194; 6.04861

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