I thought that the earth's magnetic field was our primary defense against radiation.
That is why
Magnetic Shielding seems to be
getting a lot of
attention
Admittedly, I am not an expert, but this seems like an entirely viable late-TL8/Early TL-9 technology for protecting space-farers.
I do not expect that a series of properly magnetized sections of the hull would prove terribly expensive weight-wise...