https://m.phys.org/news/2017-03-nasa-magnetic-shield-mars-atmosphere.html
In essence, they suggested that by positioning a magnetic dipole shield at the Mars L1 Lagrange Point, an artificial magnetosphere could be formed that would encompass the entire planet, thus shielding it from solar wind and radiation.
[...] In addition, the positioning of this magnetic shield would ensure that the two regions where most of Mars' atmosphere is lost would be shielded
[...] As a result, Mars atmosphere would naturally thicken over time, which lead to many new possibilities for human exploration and colonization. According to Green and his colleagues, these would include an average increase of about 4 °C (~7 °F), which would be enough to melt the carbon dioxide ice in the northern polar ice cap. This would trigger a greenhouse effect, warming the atmosphere further and causing the water ice in the polar caps to melt.
Pretty SF but I enjoyed the article.
(Score: 4, Informative) by butthurt on Saturday March 18 2017, @01:20AM
A year ago, someone asked:
Instead of placing many magnetic satellites close to Mars to artificially generate a magnetic field to protect Martian colonists from harming radiation, we could place a magnetic satellite at Lagrangian point L1. The magnetic field does not need to be as strong to deflect the solar wind enough, since the deflection takes place over millions of km before reaching the planet. What would this require to be practical?
-- https://space.stackexchange.com/questions/14352/place-a-satellite-at-sun-mars-l1-to-shield-mars-from-sun-radiation [stackexchange.com]
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