Quote:
Originally Posted by AlexanderHowl
You need GeV intensities to shield against cosmic radiation and TeV intensities to shield against charged particle beams.
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Eh, most speculation I've seen on charged particle beams was sub-MeV. Of course, it was also atmospheric only and thus entirely irrelevant to spaceships.
Quote:
Originally Posted by DataPacRat
What I'm actually aiming to protect against are the charged particles that result when a STL craft impacts interstellar atoms at >0.01c. Anything else that gets protected against is gravy.
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It won't take much to deflect the ionized ISM. Unfortunately, a meaningful fraction is not ionized (estimates seem to range from 10-25%) and won't care about magnetic shielding, nor will dust. Of course, if you limit yourself to less than around .7c you can just use regular matter.