[en] The General Atomic/Argonne National Laboratory TNS design is a tokamak that utilizes a superconducting ohmic heating coil. This coil is called an E-coil because it generates an electric field within the plasma. The E-coil system supplies the magnetic flux change (volt-seconds) through the tokamak bore which induces and sustains the toroidal plasma current. The plasma current, in turn, generates an encircling poloidal field which provides the plasma containing pressure. Located within the bore formed by the toroidal field B-coil centerpost sections is the main portion of the E-coil which is a solenoid winding. Additional E-coils are disposed around the outside of the B-coil envelope in order to reduce the fringing field which penetrates the B-coils and plasma. The coil consists of 60 individual coils connected in parallel