Feasibility of Artificial Geomagnetic Field Generation by a Superconducting Ring Network

The geomagnetic field shields the Earth from a large proportion of incoming radiation, and has thus played a key role in sustaining life on Earth. Paleomagnetic measurements have shown that the geomagnetic field undergoes many reversals of polarity. Continuous observations of the field intensity have revealed a weakening of approximately 10% over the last 150 years. If we assume that this trend indicates the onset of polarity reversal, the geomagnetic field, particularly the dipole component, may weaken sufficiently over the next thousand years to expose the atmosphere and nearby space to significantly increased levels of cosmic and solar radiation. This may have a serious impact on vital infrastructure such as satellites, air traffic, and electricity networks, as well as on global climate changes, indicating that measures should better be taken in an attempt to support the limited protection provided by the remaining higher-order multipole fields and atmosphere. Here we show that a series of planet-encircling superconducting rings can provide an artificial geomagnetic field equivalent to 10% of the present-day field necessary to prevent adverse effects. A feasible system consists of 12 latitudinal high-temperature superconducting rings, each carrying 6.4 MA current with a modest 1 GW of power requirement

Feasibility of Artificial Geomagnetic Field Generation by a Superconducting Ring Network

The geomagnetic field shields the Earth from a large proportion of incoming radiation, andhas thus played a key role in sustaining life on Earth. Paleomagnetic measurements haveshown that the geomagnetic field undergoes many reversals of polarity. Continuousobservations of the field intensity have revealed a weakening of approximately 10% over thelast 150 years. If we assume that this trend indicates the onset of polarity reversal, thegeomagnetic field, particularly the dipole component, may weaken sufficiently over the nextthousand years to expose the atmosphere and nearby space to significantly increased levels ofcosmic and solar radiation. This may have a serious impact on vital infrastructure such assatellites, air traffic, and electricity networks, as well as on global climate changes, indicatingthat measures should better be taken in an attempt to support the limited protection providedby the remaining higher-order multipole fields and atmosphere. Here we show that a series ofplanet-encircling superconducting rings can provide an artificial geomagnetic field equivalentto 10% of the present-day field necessary to prevent adverse effects. A feasible systemconsists of 12 latitudinal high-temperature superconducting rings, each carrying 6.4 MAcurrent with a modest 1 GW of power requirement