New Features of the Reversed-Field Pinch Dynamo

抄録

New features of dynamo action were found in normal-Θ discharge on the STP-3M reversed-field pinch (RFP), where Θ=B_θ(a)⁄⟨B_z⟩ is the pinch parameter. The results indicate that as the magnetic Reynolds number (S) increases, the self-organization effect works smoother in the RFP plasma, hence the toroidal magnetic flux increases continuously and uniformly in the toroidal direction. Furthermore, the effective inductance in the RFP plasma increases with increasing S and is kept constant during the plasma current duration. These features lead to the conclusion that usual discrete dynamo action does not play an essential role in the RFP dynamo.