Physics: Scientist Hans Hofer at CERN..CERN is the European centre for particle physics near Geneva. L3 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. L3 is a cylindrical assembly of many types of apparatus - hadron & electromagnetic calorimeters, drift chambers, & a time projection chamber - which fit together like layers of an onion around the point where the particles collide. L3 is a collaboration of 460 physicists from institutions in 13 countries..Geneva, Switzerland. MODEL RELEASED [1988]
![Physics: Scientist Hans Hofer at CERN..CERN is the European centre for particle physics near Geneva. L3 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. L3 is a cylindrical assembly of many types of apparatus - hadron & electromagnetic calorimeters, drift chambers, & a time projection chamber - which fit together like layers of an onion around the point where the particles collide. L3 is a collaboration of 460 physicists from institutions in 13 countries..Geneva, Switzerland. MODEL RELEASED [1988]](https://www.menzelphoto.com/img-get2/I0000DQGrcOF_IuE/fit=1000x750/g=G0000bDqn1vW59ow/SWI-SCI-PHY-08-xs.jpg)
