Hey all, I need to come up with a solution to shield a control box from the magnetic field from a 3T MRI system. With approval (that I will be very persistent to get) I am hoping to be allowed to place the box at around or even outside the 150G fringe surface. Mumetal seems to be the best possible solution. Does anyone know the limitations of this material? I can't seem to find much information on the web regarding it. At what field strength will it saturate? I took a sample into the shield room with an active 1.5T MRI system and it was obviously strongly attracted to the machine. How will it behave over a long period of time near such a strong field? This may be a bit of a long shot, but any experience you have with magnetic shielding and huge superconducting electromagnets will be interesting and helpful! PS. I read through the recent thread(s) on a very similar situation, but I felt that this would be a discussion focussed on actually shielding the control box at a reasonable field strength, as opposed to the 5 tesla that was previously being considered. Anything closer to the bore in this case is all fibre.