Calorimeter of ATLAS detector, CERN

Calorimeter of ATLAS detector, CERN

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Credit: L. MEDARD/EURELIOS/SCIENCE PHOTO LIBRARY

Caption: Particle detector. Technician working on fibre optic cables which form part of the calorimeter in the ATLAS particle detector used for the Large Hadron Collider (LHC) at CERN, near Geneva. These fibres receive the blue light generated when scin- tillator detectors are struck by particles. These fibres, each 3 metres long, are impregnated with a chemical which converts the blue light into green light. This change in the light's wavelength is needed because blue light is more heavily absorbed in the plastic of the cables than green light. The LHC has been designed to cause head-on collis- ions between particles at high energies, and is due to become operational in 2005.

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Keywords: atlas, atlas detector, calorimeter, cern, component, detector, detectr, european centre for, fibre optics, geneva, large hadron collider, lhc, nuclear research, optic, particle, particle physics laboratory, switzerland, technician

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