The Barrel Toroid consists of eight magnet coils in an array 25 m long (82 ft) and 5 m wide (16 ft). It weighs 100 tonnes. Part of the Atlas Detector, it was first tested in 2006 at an operating temperature of -269 C and is designed to use a 4 Tesla magnetic field to bend the paths of particles produced in the collisions in the Large Hadron Collider.