Shields

About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.

Superconducting Spherical Magnetic Shields on the Basis of Niobium and Its Compounds

Abstract: The method of fabrication of superconducting spherical magnetic shields on the basis of super-conducting electrolytic coatings made of niobium, Nb3Sn, and NbC is developed. These shields can be used for weakening the external magnetic fields with strength up to 800 kA/m and obtaining a magnetic vacuum lower than 0.8 × 10−5 A/m.

Tunnel magnetoresistive sensor having leads supporting three-dimensional current flow

Abstract: An apparatus, according to one embodiment, includes: a transducer structure having: a lower shield, an upper shield above the lower shield, a current-perpendicular-to-plane sensor between the upper and lower shields, an electrical lead layer between the sensor and one of the shields, and a spacer layer between the electrical lead layer and the one of the shields. The upper and lower shields provide magnetic shielding. The electrical lead layer is in electrical communication with the sensor. A conductivity of the electrical lead layer is higher than a conductivity of the spacer layer. A width of the electrical lead layer in a cross-track direction is greater than the width of a free layer of the sensor.

Magnetic field calculation of cable line with two-point bonded shields

Abstract: This paper discusses the mitigation of the cable line magnetic field by the two-point bonding of shields of cables. We produce a two-dimensional mathematical model of the cable line with two-point bonded cable shields based on the Maxwell-Ampere equation. The calculation of induced shield currents and magnetic field is carried out by the computer simulation using the finite element method. This allows to take into account a nonuniform shield current distribution and therefore to obtain the most accurate solution, as evidenced by the coincidence with the experimental research. We consider the most common case of the flat cable line and tabulate the dependence of the magnetic shielding factor from the cross-sectional area, the diameter of shields, and the distance between cables.

Protective properties of pleated wire mesh shields for spacecraft protection against meteoroids and space debris

Abstract: The use of spacecraft shield protection against orbital debris and micrometeoroids in the design of a spacecraft involves optimizing its mass. Study of the metal mesh protective shields confirmed their higher efficiency compared to the solid shields. Increasing the resistance of protective shields can be achieved, in particular, by using various geometric features of their component parts (mutual arrangement of layers, angle of inclination). In this paper, using high-velocity impact tests, the sturdiness of the authors ’ patented pleated wire mesh shield is investigated. The protective properties of the proposed construction have been confirmed to be increased in comparison with conventional mesh shields of equal specific gravity.