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                     Georges Charpak (left) and his colleagues
                    working on a multiwire chamber at CERN in
                    Geneva in 1970. 
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               In the late 1960s multiwire
              chambers were developed, in particular by George
              Charpak and his colleagues at Cern. 
              With the multiwire chamber it
              became possible to determine the trajectories of the
              numerous charged particles produced in high energy
              particle collisions with great precision. In addition
              the data taking rate increased a lot, making it
              possible to detect very rare processes. This lead to
              a breakthrough in the detailed study of many rare
              processes. 
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