High-temperature superconducting tape for magnets at 50+ tesla

Point out news stories, on the net or in mainstream media, related to polywell fusion.

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Skipjack
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High-temperature superconducting tape for magnets at 50+ tesla

Postby Skipjack » Mon Jul 09, 2018 3:40 am

This should have implications for various nuclear fusion reactor designs:
https://nationalmaglab.org/magnet-devel ... cting-tape

paperburn1
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby paperburn1 » Mon Jul 09, 2018 2:39 pm

MR. Fusion here we come.



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I am not a nuclear physicist, but play one on the internet.

Tom Ligon
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby Tom Ligon » Tue Jul 17, 2018 3:17 pm

"High Temperature" is relative. The paper shows they're working at 30 K and below, and the performance falls off at high current in the 30 K tests. Performance at 4.7 K is outstanding.

Liquid nitrogen runs about 77 K, so you don't get this sort of performance at liquid nitrogen temps. This means I can't build my own 50 T magnets yet.

I'd be so happy with my own 5 T Polywell, I could just sing! Let these guys play with their 50 T projects ... I personally am too careless laying down tools and having stuff in my pockets to come anywhere near such a monster! I can just imagine the safety rules you would need to work in such an environment!

choff
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby choff » Tue Jul 17, 2018 7:59 pm

CHoff

paperburn1
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby paperburn1 » Tue Jul 17, 2018 9:43 pm

Welders need not apply. :D
I am not a nuclear physicist, but play one on the internet.

Skipjack
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby Skipjack » Wed Jul 18, 2018 5:59 pm

Tom Ligon wrote:"High Temperature" is relative. The paper shows they're working at 30 K and below, and the performance falls off at high current in the 30 K tests. Performance at 4.7 K is outstanding.

Liquid nitrogen runs about 77 K, so you don't get this sort of performance at liquid nitrogen temps. This means I can't build my own 50 T magnets yet.

I'd be so happy with my own 5 T Polywell, I could just sing! Let these guys play with their 50 T projects ... I personally am too careless laying down tools and having stuff in my pockets to come anywhere near such a monster! I can just imagine the safety rules you would need to work in such an environment!


I am not sure anymore where I read that, but I think that up to 20 Tesla is still fine with 77k. 20 Tesla would still be almost twice as strong as the magnets in ITER. This would make both MIT's ARC and Tokamak Energy's reactor feasible.

RERT
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby RERT » Thu Jul 19, 2018 8:57 am

That ties in with what I recall of Dennis Whyte's presentation at the Tokamak Energy event at the Royal Society. He said that the HTS had changed the game so that instead of fields being limited to a few T (by superconducting transitions IIRC), the field limit shifted to around 22T, and the practical constraint on the designs was the structural strength of the steel used to build the machine (cue Wylie Coyote).

Skipjack
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Re: High-temperature superconducting tape for magnets at 50+ tesla

Postby Skipjack » Thu Jul 19, 2018 4:51 pm

RERT wrote:That ties in with what I recall of Dennis Whyte's presentation at the Tokamak Energy event at the Royal Society. He said that the HTS had changed the game so that instead of fields being limited to a few T (by superconducting transitions IIRC), the field limit shifted to around 22T, and the practical constraint on the designs was the structural strength of the steel used to build the machine (cue Wylie Coyote).

Yes, it might have been Dennis Whyte who said it.


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