Superconducting bowl shield with the optional layer of mu-metal

QuickField simulation example

This is a simulation example of the superconducting bowl shield in the uniform external magnetic field. Example is prepared by Professor James R. Claycomb as a part of the webinar QuickField for Electromagnetic Shielding Applications.

Engineering question
How to find magnetic shielding with superconducting bowl shield?

Engineering answer
Set up an axisymmetric QuickField DC Magnetics problem for a superconducting bowl shield with mu-metal and evaluate magnetic shielding from computed field results.

Typical applications
superconducting magnetic shields, mu-metal shield layers, low-field shielding systems

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

Problem Type
Axisymmetric problem of DC magnetics.

Geometry

D = 32 cm, t1 = 1 cm, t2 = 1 cm

Given
Relative magnetic permeability of mu-metal μ = 10000,
External field B = 277 mT.

Problem:
Determine the shielding factor for the single layer superconducting bowl shield and for the bowl covered with the second layer of mu-metal.

Solution
Uniform external magnetic field was defined by assigning a non-zero vector magnetic potential distribution on the simulation area boundary.

Results
Magnetic field strength distribution in case of the single layered superconducting bowl shield.

Magnetic field strength distribution in case of the superconducting bowl shield covered with the mu-metal layer

• Video: Superconducting bowl shield with the optional layer of mu-metal
  
• View simulation report in PDF