Greetings, PF forum members! I have had a sudden interest in Active Radiation Shielding (ARS), and as such, an increased interest in magnetics. I have had trouble locating any information regarding the possibility/impossibility of altering magnetic fields in such a way that changes the field's shape, strength, size, and gradient (I do not know the proper term; I am referring to how steeply the strength of the field changes as you move away from the source of the field). And so I ask for any links, knowledge, etc. that could help me understand these things. Thank you for your time!