Experiments on resistive tearing mode control in a reversed field pinch byapplying a rotating magnetic field are presented. After a brief survey oftearing mode characteristics, the actions taken to prevent theirdetrimental effects are described. These actions consist in the generationof a rotating magnetic field able to modify the dynamic of the m = 0, n = 1tearing mode. The rotating field is generated by superimposing analternating current component to the current circulating in the toroidalfield winding. To achieve this, the toroidal field circuit was appropriatelymodified. Under some conditions, the rotating field exerts a draggingtorque on the helical deformation of the plasma column, produced byphase-locked m = 1 modes, so that the deformation can be either localizedin a selected toroidal position or put into a continuous toroidal rotation.
A steady-state axisymmetric toroidal system