Excavation for L3 particle detector, CERN

Excavation for L3 particle detector, CERN

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Caption: The excavated cavern for the L3 particle detector, photographed in 1987. L3 will be one of 4 major detectors at the new LEP (Large Electron- Positron) collider, due to start work in 1989 at CERN, the European particle physics laboratory outside Geneva. The giant detector will consist of a number of sub-detectors, including a central tracking chamber, lepton & hadron calorimeters, & muon tracking chambers. These will be surrounded by a magnet consisting of 8500 tonnes of iron & standing 15. 8 metres high & 16 metres long. LEP's circular underground ring, 27 km in circumference, will be the largest scientific instrument ever built.

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Keywords: cern, collider, construction, detector, european centre for, excavated cavern, geneva, l3 detector, lep, nuclear research, particle physics laboratory, switzerland

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