Magnetic shielding
Abstract
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.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 5304836
- Application Number:
- ON: DE85017801
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; MAGNETIC SHIELDING; SPECIFICATIONS; EPOXIDES; FERROMAGNETIC MATERIALS; THERMONUCLEAR REACTORS; MAGNETIC MATERIALS; MATERIALS; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; SHIELDING; 700209* - Fusion Power Plant Technology- Component Development & Materials Testing
Citation Formats
Kerns, J A, Stone, R R, and Fabyan, J. Magnetic shielding. United States: N. p., 1985.
Web.
Kerns, J A, Stone, R R, & Fabyan, J. Magnetic shielding. United States.
Kerns, J A, Stone, R R, and Fabyan, J. Tue .
"Magnetic shielding". United States.
@article{osti_5304836,
title = {Magnetic shielding},
author = {Kerns, J A and Stone, R R and Fabyan, J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 12 00:00:00 EST 1985},
month = {Tue Feb 12 00:00:00 EST 1985}
}