this post was submitted on 03 Oct 2024
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It's better than the title implies. They also broke the MRI machine because they hit emergency stop buttons instead of stopping for a couple seconds to ask how to safely handle removing the gun.
(I'm not sure the cost difference between a graceful shutdown and an e-stop and can't find information, but if it's 250k worth of fix, I'm betting it's significant.)
IIRC the emergency stop vents the liquid helium, that's a lot of the cost I imagine.
The biggest problem is that the magnets will "quench", which is what happens when a superconducting electromagnet suddenly stops being superconducting.
There's a lot of energy stored in that magnet, and when it quenches the energy all turns to heat in a very short time. Any remaining helium will flash boil, turning into an explosive expansion of gas, and the thermal shock will seriously damage the machine
Which, in older machines, might happily pump a fuckton of gaseous helium into the room, potentially creating overpressure and squeezing the door shut while people suffocate.