Abstract
Although a SMES (superconducting magnetic energy storage system) has attractive potential for power management and quality control, the fringe field from the SMES restricts its site location. The fringe field outside a coil is expanded in a series of Legendre polynomials. The results are applied to the fringe fields of various SMES configurations, such as a single solenoid coil, toroidal coil, axially displaced coil. The derived fringe fields are scaled as functions of both the stored energy E and the maximum magnetic field B/sub m/, which are the main parameters of superconducting coil design. The fringe fields decrease as E/B/sub m/, (E/sup (n+2)//B/sub m//sup (2 n+1)/)/sup 1/3/, and ( E/sup 5//B/sub m//sup 7/)/sup 1/3/, for a single solenoid, toroidal coil, and axially-displaced coil configurations, respectively, where n is the number of coils.
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