A technician cleans 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 huge semi-cylinders of black lead glass blocks,which will move in to fit snugly around OPAL's central detector. Part of OPAL's magnet is seen at far right. Photo taken April 1989 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Plailly, Philippe |
Bildgröße: | 4453 px × 3081 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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