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Can small magnetic fields on Mars repel deadly radiation?

  1. Jun 17, 2015 #1
    Since mars doesn't have a magnetic field of its own due to the cooling of it's core, what if you took a strong magnet from Earth say a superconductive magnet or electromagnet, will the small magnetic field (relative to mars) repel solar radiation, solar flares and other background radiation form space?
  2. jcsd
  3. Jun 17, 2015 #2


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    Staff: Mentor

    The field would have to be really massive and strong. As rough estimate, the product of magnetic flux density (in Tesla) and distance should be similar. The magnetic field of earth has about 50 microtesla and thousands of kilometers, if you want to reduce this to 10 meters you need tens of tesla. The strongest large magnets (larger than a meter) have a few tesla, and going significantly above that would be really problematic. You cannot use superconductors above a certain field strength, and cooling normal conducting coils is problematic as well.
    Using some layer of rock looks much easier.
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