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I was listening to a Science Friday podcast in which the Martian movie was being discussed. The science contributors stated the radiation problems are the biggest issue for Mars exploration.

Reading Magnetic shield could protect spacecraft states that a 1 Tesla magnet would work:

Bamford and colleagues say these results show that a spacecraft could in fact be protected using a bubble just some 100–200 m across. This, they say, would correspond to a magnet of about 1 Tesla, which would be light enough to be transported into space.

How much does a 1 Tesla neodymium magnet weigh on earth?

Could permanent magnets be installed in the Mars habitat and in the seat of the rover?


marked as duplicate by Nathan Tuggy, Brian Tompsett - 汤莱恩, Gwen, Deer Hunter, ForgeMonkey Oct 20 '15 at 17:03

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  • $\begingroup$ Any sintered 1 cm cube neodymium magnet has remanence of 1.0-1.4 Tesla. But it might not be the best idea dragging a permanent magnet around the planet covered in ferromagnetic dust. $\endgroup$ – TildalWave Oct 19 '15 at 18:51
  • $\begingroup$ Wow a cube that size would protect a human? Crazy tin foil hat idea: I wonder if that would be a good idea for all of us to carry such a cube on our person? $\endgroup$ – Chris Oct 19 '15 at 20:34
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    $\begingroup$ @LocalFluff No, because if helmet r = 15 cm then at distance d = 200 m B = (r/d)³ or 0.422 nT if the helmet is covered with 1 T strength neodymium magnets. Either source strength or shielding size would have to be significantly larger. Granted, at d >> r relationship of field strength and distance is closer to inverse square, but even at B = (r/d)² our helmet only has the strength of ~ 0.56 mT. Note that this field strength at distance is directly proportional to how much deflection off their path can you expect of charged particles coming your way (but also depends on their energy levels). $\endgroup$ – TildalWave Oct 20 '15 at 1:36
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    $\begingroup$ @LocalFluff Yes, well, that's my take on it, but you might want to seek a second opinion. :) $\endgroup$ – TildalWave Oct 20 '15 at 1:47