Assembly of the apparatus for an experiment at the synchro-cyclotron (SC)

The student is Giovanni Matone, from the University of Bologna. He is seen here helping to mount the experimental equipment for measuring the diffusion of muon-proton 'atoms' through hydrogen gas, forming part of a wider experiment on the capture by protons of muons into 'atomic' orbits (see 'Last month at CERN', p. 185 of this issue). The tank containing hydrogen gas at high pressure, which acts as a proportional counter as wel[ as providing the target in which the negative muons are stopped, can just be seen on the left of the photograph. The scaffolding supports scintillation counters (some of which can be seen) for defining the incoming beam.