Construction of the LEP collider at CERN

Construction of the LEP collider at CERN

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Caption: A tunnel boring machine at work on the tunnel for the LEP (Large Electron-Positron) collider at CERN, the European particle physics laboratory outside Geneva. The photograph was taken in 1986. With a circumference of 27 kilometres, part of it running under the Jura mountains, LEP will be the largest scientific instrument ever built when it is completed. It will accelerate beams of electrons & positrons up to an energy of 100 GeV per beam & then collide them; the results of the collisions will be studied by 4 major detectors - known as ALEPH, DELPHI, L3, & OPAL - arranged around the ring.

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Keywords: accelerator, cern, european centre for, large electron-positron, lep accelerator, nuclear research, particle physics laboratory, tunnel boring machine

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