Physicist at OPAL detector, CERN

Physicist at OPAL detector, CERN

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Credit: PHILIPPE PLAILLY/SCIENCE PHOTO LIBRARY

Caption: Physicist Tonio Kobayashi in front of lead glass blocks forming part 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. It includes 2 semi-cylinders of black lead glass blocks built by the University of Tokyo group to which Kobayashi belongs. OPAL is a collaboration of groups from all over the world. Photo taken April 1989.

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Keywords: cern, detector, detector at, european centre for, geneva, kobayashi, lead glass blocks, lep collider, nuclear research, opal detector, particle physics laboratory, physicist, scientist, switzerland, tonio

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