Following the question asked here :
Would it be too hard to create an artificial magnetic field around Mars ?
Place a coil on each of the poles and turn them on, how much energy would it take to generate a magnetic field big enough to deter the cosmic radiation and solar wind ?
I believe this would cool down the outer layers of atmosphere and prevent its escape from the gravity of mars, slowing the rate at wich Mars loses its atmosphere.
Would two coils be enough to create a magnetic circuit around the planet ? Would the mass of the planet between the poles prevent (or create too much resistence) for the magnetic circuit ? Would it consume too much power to generate that field ?