Superconducting and high-permeability shields modeled for biomagnetism and nondestructive testing

Numerical modeling studies have been carried out for the design of superconducting and high-permeability shields for SQUID-based nondestructive evaluation and biomagnetic measurements. We used finite-element-method software to model magnetic shields with both axial and planar symmetry in axial and t...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2006-06, Vol.42 (6), p.1694-1702
Main Authors: Claycomb, J.R., Miller, H.
Format: Article
Language:English
Subjects:
Biomagnetics
Biomagnetism
Computer programs
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Finite element methods
finite-element method
Magnetic dipoles
Magnetic field measurement
Magnetic noise
Magnetic shielding
Magnetism
Materials science
Mathematical models
nondestructive evaluation
Nondestructive testing
Numerical models
Other topics in materials science
Physics
Position (location)
Shields
Signal to noise ratio
SQUIDs
Superconducting device noise
Superconducting magnets
Superconductivity
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Summary:Numerical modeling studies have been carried out for the design of superconducting and high-permeability shields for SQUID-based nondestructive evaluation and biomagnetic measurements. We used finite-element-method software to model magnetic shields with both axial and planar symmetry in axial and transverse uniform noise fields. Improvements in signal-to-noise ratio at the location of the SQUID were calculated for different shield geometries with line current and magnetic dipole sources at various locations near the shield
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.872006