Search found 5930 matches

by Skipjack
Thu Jul 19, 2018 4:51 pm
Forum: News
Topic: High-temperature superconducting tape for magnets at 50+ tesla
Replies: 7
Views: 1285

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

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 practic...
by Skipjack
Wed Jul 18, 2018 5:59 pm
Forum: News
Topic: High-temperature superconducting tape for magnets at 50+ tesla
Replies: 7
Views: 1285

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

"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. Thi...
by Skipjack
Mon Jul 09, 2018 10:53 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 291414

Re: SpaceX News

ladajo wrote:I have also wondered this. Or even assisted guidance towards the recovery vessel net. Have them chase each other.

I thought they were doing that already?
by Skipjack
Mon Jul 09, 2018 3:40 am
Forum: News
Topic: High-temperature superconducting tape for magnets at 50+ tesla
Replies: 7
Views: 1285

High-temperature superconducting tape for magnets at 50+ tesla

This should have implications for various nuclear fusion reactor designs:
https://nationalmaglab.org/magnet-devel ... cting-tape
by Skipjack
Tue Jul 03, 2018 7:01 am
Forum: News
Topic: New John Goodenough battery with high (too high?) energy density
Replies: 11
Views: 3601

Re: New John Goodenough battery with high (too high?) energy density

Ah, that's what you meant. Misunderstood your earlier post.
by Skipjack
Sat Jun 30, 2018 10:58 pm
Forum: News
Topic: New John Goodenough battery with high (too high?) energy density
Replies: 11
Views: 3601

Re: New John Goodenough battery with high (too high?) energy density

The paper has drawn criticism from other battery researchers, who tell Axios one aspect of the new battery cells — the relative dielectric constant — is higher than ever before recorded in any material known to science. No bold guess that Elon won't get a cell... What makes you say that? From what ...
by Skipjack
Fri Jun 29, 2018 7:59 pm
Forum: News
Topic: New John Goodenough battery with high (too high?) energy density
Replies: 11
Views: 3601

Re: New John Goodenough battery with high (too high?) energy density

So, not really much new information here. Everything still looks inconclusive and potentially overhyped.
by Skipjack
Thu Jun 21, 2018 1:18 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 18
Views: 12476

Re: Z-Pinch Renaissance

Looks like they are getting there. Goals for FuZE are: Radius =1 mm, density: n = 2 ×10^24 m-3, temperature: 2500 to 4000 eV at an input current of 300 kA. So far they are at 1–2 keV, and densities of approximately 10^17 cm3 with a radius of 3 mm. This is already a good improvement over ZAP- HD and ...
by Skipjack
Thu Jun 21, 2018 12:38 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 18
Views: 12476

Re: Z-Pinch Renaissance

Great find!
by Skipjack
Fri Jun 08, 2018 8:08 am
Forum: News
Topic: Tokamak Energy news
Replies: 90
Views: 28681

Re: Tokamak Energy news

According to their latest video their next milestone is 100 million degrees, but they will move the ST40 to a larger building and upgrade it. We will see whether reaching the next milestone happens during this year or not. https://www.youtube.com/watch?v=mjbkUIWWmVg Yes, the move to a new building ...
by Skipjack
Thu Jun 07, 2018 1:54 am
Forum: News
Topic: Tokamak Energy news
Replies: 90
Views: 28681

Re: Tokamak Energy news

I think they want to get to 100 million degrees this year. They indeed don't mention density. I suspect that the density aspect won't be reached until they add the HTSCs, which will be in the 2023 to 2024 timeframe, if I interpret their timeline correctly. This would be a significant shift to the ri...
by Skipjack
Sun Jun 03, 2018 7:47 pm
Forum: News
Topic: The list of duds
Replies: 17
Views: 5011

Re: The list of duds

The machine I always wanted to see tested was an automobile using flywheel storage. I keep wondering just how you'd mount the rotating mass. Fully gimballed, coupling power to the wheels would be tricky, unless it was all-electric. For rigidly mounted flywheels, I would expect the vehicle would occ...
by Skipjack
Sun Jun 03, 2018 6:43 am
Forum: News
Topic: Tokamak Energy news
Replies: 90
Views: 28681

Re: Tokamak Energy news

Ok thanks for the info! I hope they are able to upgrade their current device, that would save a tremendous amount of resources. I wish them the best of luck. Yes, that is the plan from what I understand. They are just starting out with the conventional magnets for now. Of course plans can change an...
by Skipjack
Sat Jun 02, 2018 12:43 am
Forum: News
Topic: Tokamak Energy news
Replies: 90
Views: 28681

Re: Tokamak Energy news

They had "ST-25 HTS" running with super conducting coils for 29 hours straight in 2015. ST-40 is starting out with conventional magnets but will be upgraded to HTSCs once these initial tests are complete. My understanding is that HTSCs for this larger Tokamak will take more development wor...
by Skipjack
Mon May 28, 2018 8:52 pm
Forum: News
Topic: The list of duds
Replies: 17
Views: 5011

Re: The list of duds

EM drive is pretty much confirmed to be a dud.

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