HiVOLT
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HiVOLT (acronym for High Voltage Orbiting Long Tether) is a concept proposed by Robert Hoyt and Robert L. Forward for removing the radiation fields of the Van Allen radiation belts that surround the Earth. A proposed configuration consists of a system of five 100 km long conducting tethers deployed from satellites, and charged to a large voltage. This would cause charged particles that encounter the tethers to have their pitch angle changed, thus over time dissolving the Van Allen belts, reducing their strength to 1% of their current value.
Chart depicting radation flux reduction - This chart illustrates that the HiVOLT System could reduce the radiation flux to less than 1% of its natural levels within six months. TUI performed the preliminary analysis simulation, on which this chart was based.