Dude, Mars has been soaked in cosmic radiation for what has been estimated to be 4 billion years. We're talking seriously long term half life of some of the forms of radiations, just one form has 1.6 million year half life.
A mag shield I didn't really even bother reading up on as the resources and energy to create a magnetic field the size of a planet couldn't be feasible IMHO.
On radiation soaked into Mars soil, I've no clue
On the Mag Shield, I think its worth reading, an old proposal that was once again presented in Washington, in a forum of world scientists in 2017 by NASA director Jim Green. Green himself termed it then as 'near fanciful'
Instead of the whole planet, he proposed what looked like a 'safe corridor', around the planets using a string of satellites synchronized to Mars rotation. Couldn't locate the picture now but if the field could be colored it would look like a wide, distant rainbow while the terra firma below remaining untouched.
But look at the results if this mag tech was financially affordable.
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.
The carbon dioxide ice is a thin layer, 6 to 8 inches which melts during the day and creates the famous dust storms. In other words, fresh water ice below the CO2 cap.
On energy requirements, Green did not say except:
new research into miniature magneto-spheres (for the sake of protecting crews and spacecraft) supports this concept.
I think if the tech can be proven the money will come.
Edited by
Palghat
on Fri 02/01/19 02:53 AM