this post was submitted on 21 Jul 2025
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Not The Onion

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[–] saimen@feddit.org 36 points 22 hours ago (3 children)

Just for your information, the machine, meaning the magnet, is ALWAYS on.

[–] 0x0@lemmy.zip 1 points 6 hours ago (2 children)

Surely dialed down in between scans?

[–] saimen@feddit.org 3 points 3 hours ago

No. They are usually superconducting magnets in persistent mode:

https://en.m.wikipedia.org/wiki/Superconducting_magnet

[–] DrSteveBrule@mander.xyz 3 points 4 hours ago

No it is only turned off during maintenance or by an emergency kill switch.

[–] Kazumara@discuss.tchncs.de 12 points 18 hours ago* (last edited 18 hours ago)

Unless something gets stuck. Then it is shut down and restarted after the thing is removed. Takes hours though, I think the startup was four hours.

They had that happen at the hospital my father worked at, the cleaning lady brought in a stool with steel legs. They tried to remove it by force first, but four men could not do it.

[–] AwesomeLowlander@sh.itjust.works 4 points 21 hours ago

Huh, I thought this was nonsense, but googling proved you're right. Very cool TIL!