Old accelerators images gallery
The horn is installed for the CERN Neutrinos to Gran Sasso (CNGS) project.
04 Nov 2005
The CERN Neutrinos to Gran Sasso (CNGS) target ‘magazine’ of five target units. Each unit contains a series of 10-cm long graphite rods distributed over a length of 2 m. It is designed to maximize the number of secondary particles produced.
01 Jun 2005
The last of the 3280 dipole magnets from the Large Electron-Positron (LEP) collider is seen on its journey to the surface on 12 February 2002. The LEP era, which began at CERN in 1989 and ended 2000, comes to an end.
12 Feb 2002
Protons accelerated in the Super Proton Synchrotron (SPS) at CERN collide with a graphite target producing mainly pions and kaons, particles with short lifetimes, which will decay in the decay tube, producing muon neutrinos.
01 Aug 2001
Neutrinos produced by decays of the products of collisions between protons accelerated at the Super Proton Synchrotron (SPS) and a graphite fixed target at CERN pass through the Earth to a huge detector at Gran Sasso in Italy.
08 Aug 2001
Engineers remove the copper (non-superconducting) radio-frequency cavities located near to the L3 experiment at the Large Electron-Positron (LEP) collider, which closed in 2000.
14 Feb 2001
The LHC will be built inside the same tunnel as an existing accelerator, the Large Electron Positron (LEP) collider which came on stream in 1989.
25 Mar 1999
These copper cavities were used to generate the radio frequency electric field that was used to accelerate electrons and positrons around the 27-km Large Electron-Positron (LEP) collider at CERN, which ran from 1989 to 2000.
1 Sep 1999
Engineers work in a clean room on one of the superconducting cavities for the upgrade to the LEP accelerator, known as LEP-2. The use of superconductors allow higher electric fields to be produced so that higher beam energies can be reached.
This diagram gives a schematic representation of the superconducting radio-frequency cavities at LEP. Liquid helium is used to cool the cavity to 4.5 degrees above absolute zero so that very high electric fields can be produced.
LEP used a revolutionary design of dipole magnet, having magnetic plates embedded in an iron-concrete yoke. Such magnets bend the beam around its circular path.
Diagram showing the cross-section of the LEP installation with the Alps in the background, the Geneva plain in the middle and the LEP underground experimental areas in the foreground.
Sextupole magnets apply corrections to the spread of the beam allowing better focusing to be achieved.
This niobium superconducting cavity was part of the prototype stages for an upgrade to LEP, known as LEP-2. Superconducting cavities would eventually replace the traditional copper cavities and allow beam energies of 100 GeV.