Design of the Advanced Toroidal Facility (ATF-1)

The Advanced Toroidal Facility (ATF-1) is a torsatron being designed at ORNL as a replacement for the ISX-B tokamak. The concept for the device includes two continuous helical field coils and a set of twelve toroidal field coils. The vacuum vessel is placed inside the helical field coils and an external toroidal shell support structure is provided to react all coil and vacuum vessel loads. The present design status for all systems is discussed.