Space Solar Power Review. Vol 8 Nums 1&2 1989

Since we also have B = 2.52/R and the coil cross sections are fixed, we must limit application of this solution to those values of PT for which the inner radius of the inner coil is 60 cm or more to allow room for shielding and ash extraction. Thus The mass of the support structure and cryogenic refrigeration might be expected to add about 10% to the magnet mass. Using Eq. 43 we can now recalculate specific power for the three systems. These calculations are presented in Tables IV, V and VI. Both systems utilizing direct conversion are clearly limited in specific power by the mass of the direct converter. For low power systems, the combination of direct and

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