Testing high temperature superconducting (HTS) tapes for use in fusion devices

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Күн бұрын

One of the jobs of the HTS team is to test samples of high temperature superconductor (HTS) tape to determine how they perform in a magnetic field. Here, HTS Magnet Physicist Matt Bristow shows us the tests he runs to determine the critical current and tells us why it's important to know this information. He also demonstrates why HTS is a superior choice over copper when it comes to making powerful magnets for fusion devices.

Пікірлер: 40

@RojCowles 3 жыл бұрын

Old enough to remember the early excitement about the discovery of the first HTS materials. Now a few decades later get to watch a KZfaq video of someone testing a mass-produced HTS tape, showing how it outperforms copper and making it look almost routine. Very impressive!

@chasthanhburns123 2 жыл бұрын

Aint seen anywhere selling it so I aint sure how it is mass produced.

@augurelite 2 жыл бұрын

WOW yeah its so amazing to see how exponentially fast technology grows. :D

@mickmccrohon 2 жыл бұрын

On my last day at HTS-110 ltd, I was resin impregnating the 1000th HTS coil we had made to incorporate into an HTS device. Just because you don't know of something doesn't mean that something doesn't exist.

@mickmccrohon 2 жыл бұрын

@@chasthanhburns123 See my comment to Rogers claim.

@mickmccrohon 2 жыл бұрын

@@augurelite Just because you don't know of something doesn't mean that something doesn't exist.

@petro6049 3 жыл бұрын

Nice vidéo ! Merci

@juan.2438 2 жыл бұрын

Amazing!

@lionelshaneyfelt5607 3 жыл бұрын

Awesome! :)

@cshorler 3 жыл бұрын

good explanation of the tech, thanks

@LT-nx7bi 2 жыл бұрын

Would you please direct me to some of your videos that further explain the connection between the applied external magnetic field and the current carrying capability? Thank you

@mickmccrohon 2 жыл бұрын

The last HTS device I was on the build team of would take the 1cm tape down to 4° Kevin and was able to rotate the tape in a 1.5 T field in 5° increments. It is currently in Germany in a HTS manufacturers facility.

@Niamato_inc 2 жыл бұрын

Greetings there, Please forgive my ignorance as I am way out my depth here. Can this HTS magnet be used instead of copper for a power dense ev motor without a need for cooling?

@kayakMike1000 Жыл бұрын

No. You would, infact need more cooling as high temperature is still only relative to the first materials discoverd to produce super conduction. They're still chilled, down to liquid nitrogen, some -195 Celsius

@colinmahon5930 2 жыл бұрын

Just wondering, what voltage was used to push current through the tape?

@kayakMike1000 Жыл бұрын

For a test like this... Good question. The busbars would present ohmic resistance, so the current going in would just follows ohms law. With a fat bus bar at cryogenic temps, you would not need much potential difference between the two to get 1000 amps. If you're in a super conducting loop, as in a magnet, a small section of the loop is warmed above the superconduction temperature. Perhaps a larger copper clamp is there to handle a huge current, but only a tiny input voltage is required to put in hundreds of amps. The magnet charges up over time as more and more current goes into the super conducting loop. The energy from the power source is put into the magnetic field. No energy is really used to make the current, odd as it would seem, moving charge has no energy outside of its magnetic field.

@kayakMike1000 Жыл бұрын

Oh and once the superconductor current saturates, just cool down that warmed section below the critical temperature and the magnetic fields just stay in place, as long as you maintain temperature.

@gabrielvanblerk1888 2 жыл бұрын

So what is the real materials used to make a high-temputer superconduter

@mauroscimone8584 Жыл бұрын

REBCO usually , Rare Earth Barium Copper Oxide

@steveslevin 3 жыл бұрын

out of interest, what equipment do you use to product a controlled 0 to +1000A dc supply??

@doctorpurple5173 3 жыл бұрын

A BIG power supply lol

@AtlasReburdened 3 жыл бұрын

@@doctorpurple5173 It shouldn't really need to be all that big since it isn't required to operate at any appreciable voltage.

@doctorpurple5173 3 жыл бұрын

@@AtlasReburdened try running thousands of amps through a small power supply and see what happens lol. Though you're right that it don't gotta be as big as one that supplies high voltage as well as current

@AtlasReburdened 3 жыл бұрын

@@doctorpurple5173 No need for me to "try". All I'd need to do is go down to my garage, plug in my 4000VA 3Voc transformer, and find a thick copper bar to short the contacts with. It's about the size of 2 open hands and granted, it would melt it's own insulation if this were sustained, but it wouldn't need too much beefing up to be able to handle 1000A at a respectable duty cycle.

@doctorpurple5173 3 жыл бұрын

@@AtlasReburdened maybe if you submerged your transformer in liquid nitrogen it could sustain the current for long enough. But I assume they're using a power supply that is not melting itself into a puddle and is also not submerged in liquid nitrogen

@pmkeith 2 жыл бұрын

Personally, I really enjoy watching these videos and getting an idea what is going on at Tokamak. Unfortunately, this “avenue of information” has gone “dark” since this last video. Having obtained my materials science degree at Oxford over 40 years ago, and having worked in commercial computer system ever since, I miss all the “tales from the bleeding edge” of science. The media is extremely poor at getting across what is happening in science in the U.K. Running such a reactor introduces the world to a potential new domain of materials science issues. It is now a race between you finishing the ST40 and getting it running and project Binky finally producing a road worthy “mini”. Am I asking too much for an update video of some sort? Or are you now running the ST40 at a “sensitive stage” and very soon hoping to announce major progress? Just asking.

@doanhvutuyen8360 2 жыл бұрын

Công việc của bạn

@harrydewinton 3 жыл бұрын

Any one else see the pink Dyson hairdryer in their rig?

@mrmkl9839 3 жыл бұрын

Well, a Dyson hairdryer is a must because they don't yet have a Dyson sphere

@boshacka 3 жыл бұрын

Seems like he messed up the right hand rule at 1:33 :P

@AtlasReburdened 3 жыл бұрын

Dude is testing superconducting tape for use in nuclear fusion reactors... and thinks that current where the charge carriers are free electrons flows from positive to negative.

@doctorpurple5173 3 жыл бұрын

Current flow nomenclature was invented before the discovery of the electron, I'm sure the nuclear scientist knows which way the electrons are going