Active Shielding Optimisation

This paper describes the analysis and the optimisation of an active shielding. The shield is designed for space application. A comparison of the performances of two magnetic shields is first used to have a point of comparison. The second shield is 2 times thicker than the first. A Finite Element Analysis of the cylindrical metallic shield in a 1 Gauss flux density is performed in 2D. An active shielding is achieved by placing coils around the cavity inside the thinner shield. Another FEA is made to explore the effect of each coil when they are fed with a current density of 1A/m2. An optimisation method is used to establish the best current density to apply in the coils to neutralise the exterior magnetic field in the inner cell. Finally an introduction to multiple shells shielding is given.