Tunnel du PS dans la zone où le faisceau de protons à extraction rapide sort vers la ligne de faisceau de neutrinos

Synchrotron ring tunnel at the point (straight section, 74) where the fast ejected proton beam is taken out for the neutrino beam-line. The proton beam passes through the tunnel wall (top centre) and is directed onto a target, The positive pions and kaons produced in the high energy collisions are converged by magnetic lenses towards the heavy liquid bubble chamber. They decay after a very short time producing the required neutrino beam.