Now, I'm by no means a physicists, but aren't iron enclosures particularly bad at containing magnetic fields?
Same as using Mu metal for magnetic shielding - https://en.wikipedia.org/wiki/Mu-metal
Anything that isn't susceptible to magnetic fields is not going to do much, even if its conductive that can only help against brief bursts.
They don't interact directly:
https://en.wikipedia.org/wiki/Explosively_pumped_flux_compre...
Is it strong enough to alter my brain?
8 T – the strength of LHC magnets
11.75 T – the strength of INUMAC magnets, largest MRI scanner
16 T – magnetic field strength required to levitate a frog
17.6 T – strongest field trapped in a superconductor in a lab as of July 2014
35.4 T – the current (2009) world record for a superconducting electromagnet in a background magnetic field
45 T – the current (2015) world record for continuous field magnets
100 T - Strongest pulsed non-destructive magnetic field produced in a laboratory
1200 T - Record for indoor pulsed magnetic field, (University of Tokyo, 2018)
2800 T - Record for human produced, pulsed magnetic field, (VNIIEF, 2001)
1 MT - 100 MT - Strength of a neutron star