Approximate expressions for the magnetic field created by circular coils inside a closed cylindrical shield of finite thickness and permeability
Journal of Magnetism and Magnetic Materials(2020)
Abstract
•An expression for coils in finite-thickness finite-μ cylindrical shields is given.•A comparison with FEM and the known expression for infinite permeability is made.•We present a graph for selecting optimal spacing of a coil pair to match shields.•We extend the classic image method to the case involving finite-thickness plates.
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Key words
Electromagnetic fields,Magnetic shields,Helmholtz coil,Mirror method,Uniform magnetic field
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