The ATLAS Barrel 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. Each coil has an axial length of 25.3 m and extends radially from 9.4 m to 20.1 m.The total assembly weight will be 830 tons. The peak field provided by the Barrel Toroid coils is 3.9 T, providing 2 to 6 Tm of bending power in the pseudorapidity range from 0 to 1.3.
