Result of Magnetic Shielding Experiment about Flow of Flux

A design of magnetic shielding for a superconducting magnetically levitated train

“…It is a future task to design a specific magnetic shielding structure and thickness distribution based on this conceptual design and to confirm the magnetic shieldings effectiveness. We have performed experiments for its verification and have already partially confirmed the effectiveness of this method, but we will report the results elsewhere [10]. We have developed this method for use in the design of magnetic shielding for superconducting Maglev trains, but it should also be useful in other areas which need magnetic shielding.…”

“…But we cannot express the current source only by expression (1). In this paper, we express the magnetic field in the outer region entirely by superposition of a new scalar potential which has a discontinuity corresponding to the current source on the original potential f and calculate it by the finite element method [2].…”

“…We approximate the original objective functional (8) by this modified quadratic functional (10). This minimization problem (P¢) of the quadratic functional (10) under the nonhomogeneous linear constraint (9) is easy to calculate, and we calculate it here, considering expression (9) by Lagranges undetermined multiplier method.…”