Results 131 to 140 of about 1,641,654 (178)

Demagnetization of magnetically shielded rooms

Review of Scientific Instruments, 2007
Magnetically shielded rooms for specific high resolution physiological measurements exploiting the magnetic field, e.g., of the brain (dc-magnetoencephalograpy), low-field NMR, or magnetic marker monitoring, need to be reproducibly demagnetized to achieve reliable measurement conditions.
F, Thiel, A, Schnabel, S, Knappe-Grüneberg, D, Stollfuss, M, Burghoff   +4 more
openaire   +2 more sources

Analog studies of magnetic shields.

AIAA Journal, 1966
Externally deflecting magnets provide a protective region around space vehicles which shields them from the hazardous space radiation. The magnetic shield simulator (MAGSIM) is an analog device that provides a simple means for directly measuring the forbidden volume or protective region produced by externally deflecting magnets.
R. LEPPER, S. LEVINE
openaire   +1 more source

Frequency Dependence of Shielding Effectiveness of Multilayered Magnetic Shields

Sixteenth International Wrocław Symposium and Exhibition, Electromagnetic Compatibility 2002, 2002
An analysis of magnetic shielding effectiveness of multilayered structures versus frequency is presented. It is shown that the quasistatic field approximation is accurate until several MHz depending on the source-to-observation-point distance, characteristic dimensions of the source, and physical and geometrical properties of layers.
MASSARINI, Antonio, U. REGGIANI, L. SANDROLINI   +2 more
openaire   +2 more sources

Study of Magnetic Shielding Materials and Fabrication of Magnetic Shield for Superconducting Cavities

IEEE Transactions on Applied Superconductivity, 2014
Magnetic properties of Cryophy were measured at room and cryogenic temperatures using ring samples. Sample-to-sample variation in permeability was evaluated in addition to measurement error. Permeability dependence on the maximum annealing temperature was examined using ring samples annealed at 1100 °C and 1170 °C.
M. Masuzawa, K. Tsuchiya, A. Terashima
openaire   +1 more source

Investigation of 2-layer Shield for Magnetic Shielding Considering Magnetic Hysteresis

The 2006 4th Asia-Pacific Conference on Environmental Electromagnetics, 2006
This paper presents the study of 2-layer shielding against power frequency magnetic field in order to increase the shielding effectiveness of the shield. The work has been investigated by finite element method (FEM) considering the hysteresis effect of magnetic materials.
P. Pruksanubal, S. Phoomvutthisarn
openaire   +1 more source

Magnetic Shielding by Superconducting Films

Journal of Applied Physics, 1962
The magnetic field distribution and supercurrent density are calculated exactly by means of the Maxwell-London equations for the case of an ideal superconducting spherical shell immersed in a steady uniform magnetic field. It is shown that the magnetic field is strongly attenuated by the spherical shell even if the shell thickness is as small as 1000 A.
openaire   +2 more sources

Magnetic shielding of nuclei in molecules

Physica, 1950
Abstract An expression is developed for the magnetic field at a nucleus of a poly-atomic molecule with zero resultant orbital and spin angular momenta in an external magnetic field. The field at the nucleus is not the same as the externally applied field because of the field arising from the motion of the electrons in the molecule. The expression for
openaire   +1 more source

Conventional magnetic shielding

Journal of Physics D: Applied Physics, 1987
A general review of conventional magnetic shielding is presented. Several possible definitions of the term 'shielding factor' are given, taking into account the ferromagnetic nature of shielding materials. An alternative treatment of single-layer axial shielding for a cylindrical shield is presented and compared to a previous approximation.
null T J Sumner, null J M Pendlebury, null K F Smith   +2 more
openaire   +1 more source

Magnetic Shielding (Shielding of Magnetic Instruments From Steady Stray Fields)

Transactions of the American Institute of Electrical Engineers, 1929
This paper is a brief survey of the vast amount of work on magnetic shielding of instruments against steady stray fields, and allied problems, by several authors during the last fifty years. It contains, first, a simplified presentation of the method of zonal harmonic analysis, by way of introduction to the mathematical theory of shielding as presented
openaire   +1 more source

Magnetic shielding mechanism and structure design of composites at low frequency: A review

Journal of Magnetism and Magnetic Materials, 2023
Shenglei Che, Wangchang Li, Xueping Xu
exaly