Systematic design of magnetic shields

Abstract In the design of magnetic shields the concept of shielding matrices has proven to be a useful means in the estimation of shielding efficiencies for simple geometries. In cases where magnetic saturation has to be taken into account and/or complex geometries occur, a numerical approach has to be used in order to analyze and optimize shielding efficiencies and field distributions. Examples for both design approaches are given in this paper. In most practical cases the permeability is dependent on annealing conditions and sensitive to mechanical stress. These aspects and others most important for a successful implementation of magnetic shields are also discussed.