>>"magical force field"
1. you mean an elctromagetic field, like we are using in the tokamaks for earth-based fusion research?<<

No, I mean one powerful enough to engulf thousands, probably millions, of cubic kilometers of space, magnetize the hydrogen and sweep it in, as I said, overcoming mindboggling levels of inertia, without being so powerful that it would not fry every piece of electronics for thousands of miles and without turning the crew quarters into a cancer factory.

Its a cool idea, but to say the least, unlikely.