Self-Organization and Plasma Dynamo in a Reversed Field Pinch

Abstract

The equilibrium of the STP-3(M) reversed field pinch has been studied under various discharge conditions. With increasing the magnetic Reynolds number, the values of field reversal ratio F and pinch parameter θ tend to be kept constant by the self-organization which is closely related to the plasma dynamo generating the toroidal flux ψ. When we vary the poloidal input energy to control the volt second for the fixed condition of a toroidal circuit, this self-organization keeps the value of K /ψ 2 constant, where K is the magnetic helicity, and prohibits the plasma from attaining the helical equilibrium state.