Phases de retournement de l’aimant vertex

Experiments in the North area have been using gigantic vertex magnets with superconducting coils 2 metres in inside diameter, with a 1 metre gap, providing a magnetic field of 1.5 Tesla. One of these magnets operated in hall EHN 2 in the experiment of the European Muon Collaboration (EMC). The difficult manœuvre of turning upside down one of the two superconducting coils of the magnet which is leaving CERN for Fermilab, where it will be used in a muon experiment at the Tevatron.