Construction of OPAL detector, CERN

Construction of OPAL detector, CERN

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Caption: Construction of the OPAL detector at CERN, the European centre for particle physics near Geneva. OPAL is one of 4 giant particle detectors at the LEP collider. LEP collides electrons & positrons accelerated to an energy of 50 GeV in a circular tunnel 100m underground & 27km in circumference. OPAL is a cylindrical assembly of many types of apparatus which fit together like layers of an onion around the point where the particles collide. The photo shows physicist David Storm of the University of Chicago working on OPAL's cylindrical central detector. OPAL is a collaboration of groups from all over Europe and beyond. Photo taken April 1989.

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Keywords: cern, constructing, detector, detector at, european centre for, geneva, lep collider, nuclear research, opal detector, particle physics laboratory, switzerland

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