Energy shield

In fictional works, a force field, sometimes known as an energy shield, force shield, defence shield or deflector shield, is a barrier made of energy or particles. It protects a person, area, or object from attacks or intrusions. This fictional technology is created as a field of energy without mass that acts as a wall, so that objects affected by the particular force relating to the field are unable to pass through the field and reach the other side. There is ongoing scientific research into real force fields, primarily to protect against radiation.

A University of Washington group in Seattle has been experimenting with using a bubble of charged plasma, contained by a fine mesh of superconducting wire, to surround a spacecraft. This would protect the spacecraft from interstellar radiation and some particles without needing physical shielding.

Likewise, Rutherford Appleton Laboratory is attempting to design an actual test satellite, which would orbit Earth with a charged plasma field around it.

In 2008, Cosmos Magazine reported on research into creating an artificial replica of Earth’s magnetic field around a spacecraft to protect astronauts from dangerous cosmic rays. British and Portuguese scientists used a mathematical simulation to prove that it would be possible to create a "mini-magnetosphere" bubble several hundred meters wide, possibly generated by a small unmanned vessel that could accompany a future manned mission to Mars.

In 2015, Boeing was granted a patent on a force field designed to protect against shock waves generated by explosions. It is not intended to protect against projectiles, radiation, or energy weapons such as lasers. The field purportedly works by creating a field of (ionised) superheated air-plasma which disrupts, or at least attenuates, the shock wave. As of March 2016, no working models are known to have been demonstrated.

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