Abstract
A comparison is made of single and double null poloidal field divertor configurations for Tokamak plasmas. Geometrical, magnetic field, MHD equilibrium and stability, and economic characteristics are considered. It was found that the single null to be preferable for small minor radii plasmas such as might be used in a fusion-fission hybrid reactor. However, the more efficient use of the available toroidal field by a double null configuration results in an increasing economic superiority that becomes the dominant consideration for pure fusion size plasmas.
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