Life problems in low gravity
Okay, bottom line it for me.
As long as you stay in the ship, magnetic shielding and structural materials will reduce your radiation exposure by about 80 percent.
You'll get about .1 millisievert per day and trip dose of about 2.5 millisieverts, well below your threshold of 50 millisieverts.
I now know more about ionizing space radiation than any sqid who has ever lived, which isn't hard considering no other sqid even knows ionizing space radiation exists.