The ATLAS End-Cap Toroid systems consists of eight coils assembled radially and symmetrically around the beam axis. The coils are of a flat racetrack type with two double-pancake windings made of 20.5 kA aluminum stabilized NbTi superconductor. They are cold-linked and assembled as a single cold mass in one large cryostat. The cryostat rests on a rail system facilitating the movement and parking for access to the detector centre. Each coil has an axial length of 5 m and extends radially from 1.65 m to 10.7 m.The total assembly weight will be 239 tons. The peak field provided by the Barrel Toroid coils is 4.1 T, providing 4 to 8 Tm of bending power in the pseudorapidity range from 1.6 to 2.7.
