Tunnel of LEP collider, CERN, in 1987

Tunnel of LEP collider, CERN, in 1987

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Caption: Part of the tunnel for the LEP (Large Electron- Positron) collider at CERN, the European particle physics laboratory outside Geneva. The photograph was taken in 1987 before installation of the collider's magnet ring. 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, lep accelerator, nuclear research, particle physics laboratory

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