Abstract
A multipole Tokamak system consisting of the self-field due to a plasma current and an appropriate external magnetic field is considered. The solutions of the MHD equilibrium equation are computed by an approximate method. The plasma current is replaced by a ring current located at he magnetic axis in the first approximation. A numerical solution of the equilibrium equation for our system with a noncircular cross section is easily obtained by using the iterative method. Typical equilibria with an external magnetic field are discussed in relation to β p . When the gradient of a vertical magnetic field is strong, the equilibrium plasma position in the horizontal direction is almost fixed. While that in the vertical direction is divergent.
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