Abstract
A set of two numerical methods is presented for determining optimum configuration of the poloidal field coils of a large tokamak. The first method is an application of the virtual-casing principle developed by Zakharov and determines both the currents and the positions of a system of the coils. The second one used a simplex method of non-linear programming for optimization calculations of the coil positions in a given area in the two dimensional space. This is needed to meet various practical requirements in the design of tokamaks. These methods have been applied in the design of JT-60 (JAERI large tokamak) to determine the positions of the ohmic heating coils, and shown to be effective when they are used in combination.
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