The present paper deals with the optimisation of closed shield for the attenuation of magnetic fields produced by direct and alternating currents. A multilayer shield made of different concentric layers is proposed. The optimisation procedure defines the best thicknesses and the distances between layers. The shield performance is required in a wide range of frequencies and magnetic field strengths (from 50-100 nT to 10000-50000 nT). In a first step the optimisation procedure has been applied to a simplified structure as a 2D cylinder immersed in a uniform magnetic field. In a second step the procedure has been applied to a 3D case, with cubic shape, which simulates an actual situation that can be found in the so called Magnetically Shielded Rooms.
Optimal design of closed multilayer magnetic shields / Canova, Aldo; Freschi, Fabio; Giaccone, Luca; Repetto, Maurizio. - ELETTRONICO. - (2017), pp. 1-2. (Intervento presentato al convegno Applied Computational Electromagnetics Society Symposium - Italy (ACES), 2017 International tenutosi a Florence, Italy nel 26-30 March 2017) [10.23919/ROPACES.2017.7916413].
Optimal design of closed multilayer magnetic shields
Canova, Aldo;Freschi, Fabio;Giaccone, Luca;Repetto, Maurizio
2017
Abstract
The present paper deals with the optimisation of closed shield for the attenuation of magnetic fields produced by direct and alternating currents. A multilayer shield made of different concentric layers is proposed. The optimisation procedure defines the best thicknesses and the distances between layers. The shield performance is required in a wide range of frequencies and magnetic field strengths (from 50-100 nT to 10000-50000 nT). In a first step the optimisation procedure has been applied to a simplified structure as a 2D cylinder immersed in a uniform magnetic field. In a second step the procedure has been applied to a 3D case, with cubic shape, which simulates an actual situation that can be found in the so called Magnetically Shielded Rooms.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2705199
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