this post was submitted on 15 Nov 2023
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According to a brief google, the MRI's magnets are super conducting, so they keep going if the machine is sitting there. Hypothetically, you could unplug the machine and wander it around, though the coils would heat up after a while and stop super conducting (at which point the coil would rapidly heat up and lose its charge as it now has resistance). Liquid helium is used to keep the coils cool and can be vented. The cooling system can also be shut off, but would take a while to start back up and cool everything down to operational levels. I imagine the system (other than the exterior vents) are probably very well insulated, so it doesn't take much power once its cooled (at least maintaining below superconductivity).
If the MRI was being used day to day, you would (could) not keep guns there. The IDF could easily claim that the MRI had been turned off for a while or something.
The magnet material is real fragile and letting it over heat can damage it and make it less effective. Here in the US I have seen it said that turning a machine off and on can cost tens of thousands of dollars in material and time to get it back up to operating after powering it down
Yeah, I've accidentally snapped rare earth magnets under their own power before. I could totally believe a big rare earth magnet would crack under thermal stress.
Apparently there's both permanent magnet MRIs and liquid-helium cooled copper magnet MRIs, both of which can cost tens of thousands in various failures. But if you don't have any source of electricity what are you going to do?
The IDF deleted the relevant video lol so they weren't super confident about this one