Abstract
The magnetic field on the external surface of the resistive shell has been measured in the T2 reversed-field pinch. Wall-locked internally-resonant modes, which produce toroidally localized , large quasi-stationary m = 1 radial field perturbations are observed. At the position of the wall-locked mode, m = 0 perturbations are generated in local dynamo events and produce a large stationary toroidal field perturbation. The m = 0 modes rotate toroidally from the location where they are produced and diminish within one toroidal turn. Numerical, resistive magnetohydrodynamic simulations verify the correlation between a m = 1 radial field and a toroidal field perturbation.
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