Engineering

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A place to geek out about engineering, fabrication, and design. All disciplines are welcome. Ask questions, share knowledge, show off projects you're proud of, and share interesting things you find.

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kersploosh@sh.itjust.works

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 2 weeks ago by Innerworld@lemmy.world to c/engineering@sh.itjust.works

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[–] SkybreakerEngineer@lemmy.world 5 points 1 week ago (2 children)

Still requires liquid nitrogen

[–] ikidd@lemmy.world 18 points 1 week ago

Well, we can't make that. Too bad. Sounded useful.

[–] captain_aggravated@sh.itjust.works 2 points 1 week ago (1 children)

To make, or to use?

[–] Wrufieotnak@feddit.org 5 points 1 week ago* (last edited 1 week ago) (1 children)

Using it. Those magnets depends on superconducting, which is only possible at low, really low temperatures (often close to absolute zero at 0K). Also the energy that generates the magnetic field also generates a lot of heat. So we cool those magnets with liquid nitrogen.

Also the problem isn't the liquid nitrogen but rather the liquid helium that is needed to reach the really low temperature ranges. Because helium is more scarce and expensive.

[–] RobotToaster@mander.xyz 8 points 1 week ago (1 children)

It's described as "high-temperature superconducting" in the article, so "only" needs liquid nitrogen

[–] Wrufieotnak@feddit.org 2 points 1 week ago* (last edited 1 week ago)

Ah then I didn't read the method section long enough. I just read to the part where they describe they used helium to cool to 4 K. Thx for the correction!