Palm-sized magnet reaches 42 tesla, approaching the strength of the world’s most powerful magnets while using a few thousand times less power and over 1,000 times smaller coil volumes (interestingengineering.com)

submitted 3 days ago by Innerworld@lemmy.world to c/engineering@sh.itjust.works

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[-] zr0@lemmy.dbzer0.com 8 points 2 days ago

An MRI has a couple of Tesla, and everybody knows how dangerous ferromagnetic materials are close by.

This new magnet here has 42 Tesla.

I don’t even comprehend how you can turn this thing on without having forks and knives fly around 100m away.

[-] offspec@lemmy.world 16 points 2 days ago* (last edited 2 days ago)

Inverse square law my beloved

[-] Redjard@reddthat.com 3 points 2 days ago

We have no magnetic monopoles, so at maximum this is a dipole field with inverse cube. Given they must be focusing in the field as much as possible, I'd expect it to drop off much faster than that.

[-] offspec@lemmy.world 5 points 2 days ago

See I started with inverse cube and then edited it because I'm a coward

[-] zr0@lemmy.dbzer0.com 3 points 2 days ago

And Tesla is probably a linear scale. Then what are they excited about mere 42 Tesla. We need 40 kilotesla next.

this post was submitted on 14 Mar 2026

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