http://www.cnn.com/2013/06/27/world/eur ... le_sidebar
Reminds me of the field gradient inside a polywell.... What we discovered is that if you put a magnetic field around an object in a flowing plasma, the electrons, which are very light, will follow the new magnetic field that you've put there but the ions, the very fast ions, will overshoot -- they won't follow the magnetic field lines.
"You end up with a constant electric field that can be enough that it actually refracts or deflects enough of the radiation from inside the magnetic cavity that you've formed to protect the astronauts ...