On 3/18/2017 12:05 PM, dlzc wrote:
Presumably, they can angle the magnetic field far
enough in advance to aim the solar wind "shadow",
right as Mars is passing through it.
Only with "new physics". Either they make a symmetric field 20 times the diameter of what is required (because we only know how to make symmetric fields), or they add a small amount of energy to keep the source that far ahead of Mars.

You can do it with multiple satellites each orbiting around the L1
point, they can all be adjusted individually and oriented individually.