World’s largest superconducting magnet turns on


The ATLAS detector under construction in 2005. © CERN

The ATLAS Barrel Toroid, a characteristic component of the detector, then the largest superconducting magnet ever built, is switched on for the first time. It works together with the two Endcap Toroids and a central Solenoid magnet to bend the paths of charged particles produced in collisions at the LHC, enabling important properties to be measured.