The analytic solutions and numerical solutions of the equations of magnetic surface with fixed-boundary conditions are solved for the equilibrium plasma. The pressure, the velocity and the magnetic field fluctuations are evaluated with the simplified Lax-Wendroff method. The linear growth rates, the average β and βp, and the safety factor are obtained. We find that (1) plasma with concave currents profiles is more stable than that with uniform currents profiles, and plasma with convex currents profiles is least stable; (2) plamsa with diamagnetic currents is more stable than that with paramagnetic currents.
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