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Mu-metal cylinder shield for the static magnetic field shielding

This is an example of the mu-metal cylinder shielding simulation, performed with QuickField software.

Problem Type: axisymmetric problem of DC magnetics.

Geometry:
Mu-metal cylinder shield
D = 10 cm, L = 10 cm.

Given:
Relative magnetic permeability of mu-metal μ = 10000,
External field B = 0.5 T.

Problem:
Determine the shielding factor for axial and transverse field direction.

Solution:
Two problems were simulated: axissymmetric (mu_metal_rz.pbm) for the axial magnetic field and plane-parallel (mu_metal_transverse.pbm) for the transverse magnetic field. Uniform external magnetic field was defined by assigning non-zero vector magnetic potential on the simulation area boundary.

Results
Magnetic field strength distribution in case of the axial magnetic field
Axial magnetic field strength inside the shield

Magnetic field strength distribution in case of the transverse magnetic field
Transverse magnetic field strength inside the shield

Magnetic flux density
inside the cylinder shield

Axial field

78 mT (16%)

Transverse field

0.56 mT (0.1%)


See more in QuickField for Electromagnetic Shielding Applications webinar.

Download PDF icon View simulation report in PDF.

Download icon Download simulation files (files may be viewed using any QuickField Edition).