Question

7) What would you use to shield civilians wearing pacemakers from a powerful magnetic field that extends down from a superconducting magnet used on the floor above?

Please explain in clear words. Thanks

Answer 1

Dear Friend, my analysis is as follows

Magnetic fields are the invisible force .There is no way to block the field lines.

In order to be able to shield a magnetic field, one must have a clear understanding of the definition. The field can be defined as the force that is exerted on a moving charged particle. The magnet produces a vector field at all points in the space around it.

There are four factors to consider when attempting to shield magnetic fields. The first is the shape, which has an impact on the effectivenes. The most efficient shield shape is a sphere. Cylindrical shapes are also ideal because magnetic field lines resist making sharp turns. The bigger a shield, the more field lines it will attract. 2 to 3 feet beyond the dimensions of the source has proven to be very effective. In addition to this, a thicker shield will also make a considerable difference. One must also take into account the position of the shield. If it is parallel to the field, it will perform much better.

There are several types of materials that can be used for a magnetic shield. They will depend on the applications, which can range from strong fields over 1 Gauss to moderate and high frequency fields. Grion, magnetShield and PaperShield are the ideal choice for powerful fields. Low saturation, high permeability alloys, such as MetGlas are used for moderate fields. High frequency applications will need Finemet or CobalTex products.

Conclusion

Which material is right for you depends on your specific shielding problem. For low field strength, sensitive electronics, MuMetal can provide better shielding than steel. For many applications involving large, powerful neodymium magnets, the higher saturation point of steel serves better. In many specific cases, a steel sheet-metal shield is often the best solution.

GIRON Magnetic Shielding Film, which does not contain Nickel, is unlike any other magnetic shielding material available on the market today. Suitable for high field strength applications requiring high saturation and good permeability, it is both thin and strong, and unlike Mu-metal™ it is very tolerant to bending or shaping without losing its shielding properties.

Hence the floor bottom should be coverd by any of the above material which you would like to use.

Warning signs must be adhered to the walls.

Thank you.