Rotations of Reversed Field Pinch Plasma due to the Resistive Tearing Modes : Fluids, Plasmas, and Electric Discharges

概要

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Poloidal and toroidal rotations of the reversed field pinch plasmas induced by the magnetohydrodynamic resistive tearing modes are numerically studied by using the ohm's law with the ion inertia term. The modes with the poloidal mode number m = 1, which mainly grow around the center in the cylindrical plasma are taken into account. In the case of the non-resonant mode, the direction of the induced toroidal rotation velocity of the plasma around the center is same as that of the toroidal magnetic field. The toroidal velocity at the center is decelerated about the time when the magnetic energy of the unstable mode reaches the nonlinear saturation level. The direction of the toroidal velocity of the mode at the boundary is opposite to that of the plasma around the center before the time the instability reaches the nonlinear saturation level. In the case of the resonant modes the reversal of the rotations appears around the singular point. In the multi-mode case the behavior of the plasma rotations shows such features of the single mode as the reversal of the toroidal velocity at the center and of the rotations around the resonant region.
社団法人日本物理学会の論文
2000-06-15