Advanced Trends in Using Electro – Anti-Gravitational Propulsive Unit with Magnetically Levitated Runways in Space Missions

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of about 500 T/cm.

3. Implementation Implementation of this method also possess challenges, which are to be tackled. They are also discussed as a subject of this paper. One of the challenges is to safeguard magnetic data storage media and space craft electronics from the magnetic field. This could be done by providing a ‘magnetic shield’ and which should also be a ‘gravitational shield’

10000 d(B2)/dx d(B 2)/dx=2B(dB/dx)

Advanced Trends in using Electro – Anti-gravitational Propulsive Unit 151

In fact, magnetic shielding is essential to protect the crew and electronic equipment. But shutting out a static magnetic field to protect an object isn’t that hard. All we need to do is that, when the object in a space craft is made of a "superconductor", the material will carry an electrical current without any resistance and later it is cooled sufficiently close to absolute zero. If the space craft encounters a magnetic field, the current flow within the conductor will generate a field that counteracts the applied field. In an ordinary conductor, the resistance of the metal quickly snuffs out the current flow. Outside the space craft, the field produced by the superconductor will alter the applied field and reveal its presence. In a nutshell, the field is experienced as a distribution of lines of force that vaguely resembles a weather map of winds. The superconducting shield pushes the magnetic field lines outward, creating a hole in the field. So the trick is to make a shielding for the static magnetic fields to counteract that distortion. A shield could be made of a material that repels magnetic fields in one direction and attracts them in the opposite direction. Unfortunately, these selfcontradicting materials do not exist. Some layers are easily magnetized and will essentially pull the external magnetic field lines around the space craft, those layers alternate with shells of superconducting plates that push on the field, preventing it from coming straight towards the center. The attracting layer would be made of tiny magnetic particles, like submicroscopic iron filings, mixed into a non-magnetic material such as plastic. The shield could handle fields of any shape and strength within what the superconductor can stand. If the external field gets too strong, the magnetically induced current becomes so powerful that it knocks the superconductor out of its resistance-free state and ruins its field-repelling qualities. Computer simulations showed that the shield could work with as little as four layers, but with 10 layers it would guide a magnetic field nearly with a perfect shield. Another challenge is to account for the slight increase in weight of the space craft. This can be compromised by lesser maintenance cost for the space craft.

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