Magnetic shielding

Patent · Tue Feb 12 04:00:00 EST 1985

OSTI ID:5304836

Kerns, J A; Stone, R R; Fabyan, J

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy
• Patent Number(s): None
• Application Number: ON: DE85017801
• OSTI ID: 5304836
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
EPOXIDES
FERROMAGNETIC MATERIALS
MAGNETIC MATERIALS
MAGNETIC SHIELDING
MATERIALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SHIELDING
SPECIFICATIONS
THERMONUCLEAR REACTORS