Transient current distribution on a vacuum vessel of a large tokamak

A numerical method is presented for determining transient current distribution on a vacuum vessel of a large Tokamak which has no electric insulation in the toroidal direction. The vacuum vessel is treated as many toroidal conducting rings connected electrically with their mutual inductance. The current distribution on the vessel is determined from the currents of these rings by solving the circuit equations. The inductance of the vessel is determined after taking the current distribution into account. By this method, the current distribution of a vacuum vessel with arbitrary cross section can be obtained. (auth.)