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FSU Sets 7 World Records In High Magnetics Research

timothy posted about 11 years ago | from the research-and-fun dept.

Toys 178

spence calder writes "FSU's High Magnetic Field Lab, more specifically my Kenpo teacher, just broke 7 world records, and brought the record for a superconducting magnet to 25 Tesla. Check it out at FSView and a more detailed article here. Now if only our football team was that cool." And if you'd like your magnetic toys to shoot metal bits, Jason Rollette points to his railgun project, which looks like good, clean, high-voltage fun.

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FSU? (-1, Offtopic)

Anonymous Coward | about 11 years ago | (#6897860)

I thought they were only famous for partying, failing out, and hot sluts... little did I know they were good in EM!

Re:FSU? (0, Offtopic)

l810c (551591) | about 11 years ago | (#6897875)

They have a decent football team ;)

/. = Server Railgun (2, Funny)

l810c (551591) | about 11 years ago | (#6897867)

Jason's Blog has tons of cool pictures And video. I doubt it holds up.

Re:/. = Server Railgun (1)

spiny (87740) | about 11 years ago | (#6897883)

it appears to be busted already:

HTTP error 504

504 No response from server

Error connecting to ''.


Re:/. = Server Railgun (1)

Slack3r78 (596506) | about 11 years ago | (#6897920)

A full scale slashdotting even at 3:00AM EST. Impressive. :)

Re:/. = Server Railgun (1)

freek254 (613417) | about 11 years ago | (#6898116)

At 10:56 AM CET it's less surprising.

Re:/. = Server Railgun (1)

spectrokid (660550) | about 11 years ago | (#6898322)

The dude links 5 Meg video's on \.? What is this guy, masochist or sth?

Calm down it's not FSF! (-1, Troll)

Anonymous Coward | about 11 years ago | (#6897872)

How this post made it here? FSU is not a FSF branch...

25 Tesla? (5, Funny)

Read Icculus (606527) | about 11 years ago | (#6897873)

That'll keep those damn Americans off my base.


Re:25 Tesla? (1)

Anonvmous Coward (589068) | about 11 years ago | (#6897969)

To the mods who are about to mod parent post down, it's a C&C joke. A funny one at that.

Re:25 Tesla? (1)

jerde (23294) | about 11 years ago | (#6898025)

it's a C&C joke. A funny one at that.

Could you explain it for us poor ingorant saps?

- Peter

Re:25 Tesla? (0)

Anonymous Coward | about 11 years ago | (#6898049)

It's not really that good of a joke, but in Command & Conquer: Red Alert (which is a real-time strategy game of course, like Warcraft or Starcraft), there was a defensive turret-type structure for the Soviet side called a Tesla coil. It "electrocuted" units (really it was more of a laser-type attack with a lightning bolt graphic). 25 of them would be quite formidable.

Re:25 Tesla? (0)

Anonymous Coward | about 11 years ago | (#6898065)

For background: The C&C: Red Alert series takes place in an alternate history where Hitler was removed from the timeline before he came to power. However, without Hitler around to keep the Soviets busy, Stalin is free to invade Europe.

During the war, the Soviets develop a defense structure based on Tesla coil technology. The bolts of electricity generated by the coils make short work of most Allied infantry and vehicles (in reality, such attacks would probably be ineffective against most vehicles, due to the faraday cage created by the metal frame--even a consumer automobile can withstand a direct hit from a bolt of lightning).

Re:25 Tesla? (1)

Ewan (5533) | about 11 years ago | (#6898314)

well funny is a stretch, but in c&c red alert, it was the russians vs the americans in an alternate universe where russia had conquered europe in world war 2.

The americans had normal weapons, the russians had cool stuff like tesla coils and mind control weapons. tesla coils were the best defensive weapon in the game

Re:25 Tesla? (1)

aminorex (141494) | about 11 years ago | (#6898691)

Cool. Oh, and what the hell is C & C?
Canadian and Coke?

Hmmm... "Railgun", "Shooting Metal Really Fast"... (0)

Anonymous Coward | about 11 years ago | (#6897884)

Does this have anything to do with that Indians using satellites to prevent traincrash story from a few days back?

"...good, clean, high-voltage fun." (5, Funny)

Anonymous Coward | about 11 years ago | (#6897887)

Yep, Alfred Nobel probably said a similar thing when inventing dynamite.

Re:"...good, clean, high-voltage fun." (1)

Penguinshit (591885) | about 11 years ago | (#6898003)

Hey.. you ripped that idea from my post in the previous story, thereby violating my IP. You owe me $699. This offer is good until October 13, 2003.

Show me. (0)

Anonymous Coward | about 11 years ago | (#6898012)

Show me the exact post via a direct link, Mr. McBride.

Re:Show me. (1)

Penguinshit (591885) | about 11 years ago | (#6898064)

I could do that, but that would pollute the case prior to judicial ruling.

Please just buy a license to protect your ability to further discuss Dr. Nobel. and his "weapon to end all war".

All mention of diatomaceous earth and nitroglycerine compounds are clearly a derivative work of my post and are therefore subject to my license.

I'll be happy to abide by IP law... (0)

Anonymous Coward | about 11 years ago | (#6898084)

...the second I set foot on your "Urth". Until then, your terrestrial laws have no reach in my quadrant. What ever happened to that O.J. fellow who was giving you bipeds fits?

cool ! (0)

selderrr (523988) | about 11 years ago | (#6897888)

now where's that frog ...

Re:cool ! (0)

Neppy (673459) | about 11 years ago | (#6897895)

Quite possibly its not a whole frog anymore..

Congratulations (1)

nounderscores (246517) | about 11 years ago | (#6897892)

A powerful superconducting magnet at higer temperatures is always welcome. MRI and NMR people can now rejoice! more powerful magnetic fields mean better instruments right?

Re:Congratulations (5, Informative)

DrLudicrous (607375) | about 11 years ago | (#6897928)

Yes and no. Most MRI systems for humans operate at about 1.5 Tesla. I know of at least one 8 Tesla system, but that is experimental. The higher the static field (i.e. the 25 Tesla), the better the resolution of your system can be.

No one knows the effects of an 25 Tesla magnet on biological tissues. In addition, in order to get useable information out of an MRI system, one must hit it with radiofrequency (RF) waves. The higher the static field is, the higher these frequencies are going to be. A 7-tesla magnet uses frequences around 300 MHz. Therefore, by extrapolation (which I believe is right, since I know that a 9T system uses about 383 MHz), a 25 Hz system would need about 1.1 GHz. This might very well be extremely detrimental to biological tissue. In other words, to do MRI, you'd have to cook your sample.

Finally, to truly achieve a resolution advantage, you will need very powerful gradients. The gradients one would need to take advantage of such a system would be gigantic, at least tens if not hundreds of Tesla per meter. This would be very difficult to design for samples as large as a human body, if not impossible with today's technology, and at the very least extremely expensive.

Personally, I can see a 25 Tesla magnet being useful, just not for MRI. Perhaps for NMR being using not for imaging purposes, but in the study of non-soft condensed matter systems (i.e. not biological or organic, but solid state). It would be useful for examining superconductivity also.

Re:Congratulations (0)

Anonymous Coward | about 11 years ago | (#6897941)

This might very well be extremely detrimental to biological tissue. In other words, to do MRI, you'd have to cook your sample.

Couldn't you pulse it? That way the power absorbed by the tissue per unit time would be lower.

Re:Congratulations (4, Informative)

DrLudicrous (607375) | about 11 years ago | (#6897970)

MRI is all about pulses my friend. Good point. The reason for the pulses is not to protect the tissues- basically it is a timing issue that allows for nuclear spins to reach certain alignments which are favorable to making measurements that can lead to making an image, hence magnetic (the field) resonance (nuclear spin resonance of the hydrogen [most common] atoms in your sample), imaging (after data analysis of RF signals, you get a pretty picture).

BTW, at smaller scales, things work a bit differently- it is much easier to make powerful gradients over a small distance (say a few millimeters, or hundreds of microns) than it is over larger ones (say a human torso, or even a forearm). I wish I could be more specific about this, but my theory background on MRI is still a work in progress- I hope I didn't screw anything up in my post above. Any MRI geeks out there, feel free to correct or add anything I missed.

Re:Congratulations (1)

DrLudicrous (607375) | about 11 years ago | (#6898143)

BTW, I did a bit of quick internet research. I would say that 1GHz would be OK for biological samples- it is on the low end of the 'microwaves' (energy in an RF wave linearly increases with the frequency). Still, this is the same principle that reheats your food in your kitchen nuker. There are already techniques using less magnetic field and higher RF pulses (these are different from MRI). Check out etter/Newsletter9/fc6.htm for some info on Electron Spin Resonance (looks at electrons' spins instead of those of nuclei).

Re:Congratulations (2, Funny)

eyeye (653962) | about 11 years ago | (#6897982)

yes this will also change the fridge magnet industry beyond recognition.

Re:Congratulations (-1, Flamebait)

Anonymous Coward | about 11 years ago | (#6898111)

You weren't all worried about Iraq and democracy and freedom when the Bathists were runnig the show? Oh I see you want a really fucking horible mess so Osama has a new place to live now things are finally getting hot for him in Pakistan. Apperently there are not enough dead shities and mass graves for you sunis as evidinced by your bombings of the UN and Najif.

Re:Congratulations (0)

Anonymous Coward | about 11 years ago | (#6898059)

yeah yeah yea.. but how many scrap cars can it lift?

Re:Congratulations (1)

ponxx (193567) | about 11 years ago | (#6898633)

The problem for making a good NMR magnet is not the high field but sufficient homogeneity over the sample volume. Also, 25 Tesla is not that far off what currently used magnets can do, 21 Tesla magnets for NMR are hideously expensive, and not exactly standard, but there are quite a few of them around in the world...

Still, you're right of course, any advances in magnet technology will be welcome :), i just don't think this is a particularly big breakthrough.

As for MRI people. They generally work at much lower fields, as the magnets need to accomodate huge samples (humans) rather than the little tubes solution state nmr people use... I've seen a 4.5 T one for brain-imaging, but i think the standard ones are about 1.5T.

Football? (5, Funny)

Jonas the Bold (701271) | about 11 years ago | (#6897896)

Now if only our football team was that cool Are you sure you're a geek?

Another railgun link (2, Informative)

DarenN (411219) | about 11 years ago | (#6897899)

is []

They have a detailed overview of the physics involved, too.

Re:Another railgun link (0)

Anonymous Coward | about 11 years ago | (#6898653)

Umm, why do their records stop in the middle of last year? In fact, just before they declared themselves "ready to fire"? Don't try this at home, kids....

Is there any breakthrough here? (2, Interesting)

kmac06 (608921) | about 11 years ago | (#6897901)

Neither article got into any detail, but I get the impression this is just a "bigger better" thing, not any particular breakthrough. Just put a few more coils and you get something big surprise? Or is there something I'm not seeing here?

Re:Is there any breakthrough here? (5, Interesting)

hbackert (45117) | about 11 years ago | (#6897965)

It is a bit more tricky than just 'add more coils' or 'use more current'.

Back at university we had a 14T He cooled magnet. Reaching 12T was standard. No issues. But having 2 more Teslas out of that thing took many tricks: pumping off the Helium to make it even colder, increasing current near the limit. The thick copper cables got pretty warm. And heat and superconducting coils and Helium don't mix well, so for us, 15T was unreachable.

It's not unsimilar to the 10s/100m in athletics: Everyone get's close, but it took some time until someone finally was faster than 10s.

20T was the limit for 'usual' magnets. Getting more needed a new trick. But I admit that for people not using this stuff, it looks very much like no particular breakthrough. Like I never cared if I can run 100m in 10.1 or 9.9s. It's just 2% difference after all, isn't it?

Nope, you see it correctly. (0)

Anonymous Coward | about 11 years ago | (#6897966)

Just the EM analog of the "you can't beat cubic inches" rule for motor horsepower creation.

The problem with railguns (3, Interesting)

afidel (530433) | about 11 years ago | (#6897905)

Is that no material can take the EM pulse AND the physical abrasion. I guess levitating the object and magnetically containing it during its travel might work but no one has done that so far AFAIK. Every rail gun experiment I have seen needs to replace the rails every couple of shots if they try very high pulse energies.

Re:The problem with railguns (4, Informative)

imsabbel (611519) | about 11 years ago | (#6898034)

The problem is that you cant levitate your object because you need it touching the rail to conduct the drive current.

Thats the main problem. Else you could just throw a bagload of teflon on the slug and fire away.

The main problem is not physical abrasion, but the fact that even if the projectile fits perfectly, the current density creates arc discharges between rail and slug, vaporizing the top layers

Weapon (0, Troll)

jabbadabbadoo (599681) | about 11 years ago | (#6897907)

If they get any stronger now, the terrorists may have a great weapon, sucking planes and sea wessels down and under.

Re:Weapon (0)

Anonymous Coward | about 11 years ago | (#6897922)

You have been watching too many roadrunner cartoons

Re:Weapon (0)

Anonymous Coward | about 11 years ago | (#6897954)

wake me when they can suck the iron out of your blood

Re:Weapon (1)

B3ryllium (571199) | about 11 years ago | (#6898004)

Oh, are you making an X-Men 2 reference? Don't forget, the iron had to be specially injected.

Re:Weapon (1)

DrLudicrous (607375) | about 11 years ago | (#6898037)

The iron in your blood is not ferrogmagnetic because it is part of a molecule- hemoglobin which is more or less not affected by magnetic fields.

Now if you were to inject a bunch of fine iron fillings, you might have a case, but you would also be very dead before the blood ever got sucked out.

Re:Weapon (1)

cra (172225) | about 11 years ago | (#6898094)

And why would they want to suck all that stuff down to Australia?? ;-D

Lemons! (-1, Offtopic)

Anonymous Coward | about 11 years ago | (#6897911)


25 Tesla (1)

PD (9577) | about 11 years ago | (#6897912)

1 Tesla is the same as 1 weber per square meter. The dictionary says

The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.

question: Is that charge spoken of a static charge? If it is, how big is that charge compared to typical static charges?

Re:25 Tesla (4, Informative)

DrLudicrous (607375) | about 11 years ago | (#6897951)

The charge is not static. It says "velocity of one meter per second". That means it's moving- if it wasn't moving, there would be no force on it, despite the magnetic field.

One electron has a charge of 1.6E-19 Coloumbs, so you are talking about the equivalent of 6.7E18 electrons moving at 1m/s. One coulomb is the amount of charge that passes through a point in a wire in one second which is carrying one Amp of current.

The instantaneous force being described would be perpendicular to both the motion of the particle and that of the magnetic field. Make a gun with your right hand, let your index finger point in the direction of the charge, let the field point in the direction of your thumb. Stick out your middle finger so it makes a right angle with both digits, and that is the direction of the force.

Re:25 Tesla (1)

Mentally_Overclocked (311288) | about 11 years ago | (#6898039)

If the velocity is constant, then its derivative would be 0, likewise its force would be the same.

If you are referring:

F = k (|q1|*|q2|)/r^2

Then it doesn't really have to do with motion.

Who knows, I'm just getting started with E&M physics.

Re:25 Tesla (4, Informative)

DrLudicrous (607375) | about 11 years ago | (#6898078)

Well, that is a good try. The equation you have is one of the first taught in electroSTATICS. We are talking about electroDYNAMICS, ie moving charged particles, versus arrangements of particles that aren't moving.

In that case, the equivalent of Coulomb's Law becomes

F=q(E+v x B)

Here, F is force, q is the charge that is moving, E is the electric field (if present, you may remember something like E=kq/|r|, which is basically the force law you listed divided by a charge, giving units of Newtons/Coulomb), v is the velocity of the moving particle. All quantities in bold refer to vectors, so they not only have magnitude, but direction. In the case of the weber definition above, there is no electric field, so that part has no contribution. We are then left with:

F=q(v x B)

Here, the x does not just mean normal scalar multiplication but vector multiplication. All this means is to take into account the angles between the directions of the velocity and the magnetic field. Either way, the force will be perpendicular to both, so if you can imagine drawing lines indicating the velocity and magnetic field lying in a plane, the force the particle experiences points straight out of that plane. The more in line the velocity and field are (i.e. the smaller the angle they make relative to one another in that plane) than the smaller the force will be. If the particle is moving in the direction that the magnetic field points in, then it will experience no force- again, this is a result of the vector multiplication (better known as the cross product, where A x B=|A||B|Cos[theta], where theta is the angle between A and B.

Make sense? If you have questions, post them here.

Re:25 Tesla (-1, Offtopic)

Anonymous Coward | about 11 years ago | (#6898202)

blah blah blah, potato salad

Re:25 Tesla (1, Funny)

Anonymous Coward | about 11 years ago | (#6898271)

Is this gonna be on the final?

Re:25 Tesla (1)

imsabbel (611519) | about 11 years ago | (#6897967)

Think of metal.
You get a carrier density of 10^23 cm^3 with a charge of e =1.602*10^-19 each.
so you have around 10000 coulomb per cm^3.

Compared to capacitors, a coulomb is a lot, but in metallic conductors a lot of charge is moving, which results in very low carrier speeds (typically around 1cm/s under normal circumstances).

But with those magnets, you have much higher current densitys and those forces become one of the main problems designing them. They are heavily reenforced with aluminium structures because they would simply fly apart...

Re:25 Tesla (1)

jerde (23294) | about 11 years ago | (#6898018)

question: Is that charge spoken of a static charge? If it is, how big is that charge compared to typical static charges?

A coulomb is just a certain number of electrons [] . Magnetic forces act on any charged particle in motion, so the units for the strength of a magnetic field are the amount of force on a certain number of charged particles moving at a certain speed.

How much is a coulomb? Besides saying that it's 16 billion billion (1.6e19) electrons, it's easier to think about what that amount of electrons will do:

If you raise one coulomb of electrons to 100 volts potential, and then let them pass through a light bulb over the course of one second, you would get 100 Watts of light+heat from that light bulb. To light the bulb continuously at that voltage, 1 coulomb per second of electrons needs to pass through it.

The handy name for coulombs per second, of course, is the ampere, or amp.

Really makes you think: some modern CPUs come close to using 100 watts of power, at, say, 3 volts. That's over 30 amperes of current, or somewhere on the order of 450 billion billion electrons being shoved through every second.

- Peter

Re:25 Tesla (My that's a lot) (1)

Crypto Gnome (651401) | about 11 years ago | (#6898505)

1 weber per square meter

My that's a lot of BBQs.
Reminds me of Australia in the Summer.

10th post!!! (-1, Offtopic)

Anonymous Coward | about 11 years ago | (#6897921)

Iraq to the Iraquis!

No blood for oil!

Impeach Bush!

Nader 2004!

Railgun: Repeatable Access Denial System (3, Funny)

dbIII (701233) | about 11 years ago | (#6897925)

Metalstorm ( is a company possibly within projectile distance of where I live that are working on railguns.

Since they are working on a system called "Repeatable Access Denial System" they just have to be mentioned on slashdot!

Huh? (1, Funny)

Anonymous Coward | about 11 years ago | (#6897926)

> The previous records, held by a group of Japanese industrial scientists,
> rated a superconducting magnet at 20 Tesla, which is 400,000 times
> the magnetic field of the earth. The new record is now 25 Tesla,
> which has a generated magnetic field of 500,000 times that of the earth.

I only hope they deactivated the first before turning on the second!

Re:Huh? (3, Informative)

DrLudicrous (607375) | about 11 years ago | (#6897983)

The magentic field in these magnets is very localized. They have tiny "bores", i.e. the area inside the magnet where there is actually high field. The earth on the other hand, has a much larger volume of magnetic field, even though it is smaller in magntiude.

So it is kind of a matter of concentration. Your keys aren't going to flying out of your pocket b/c these magnets get turned on, nor will they affect your compass because you are too far away from the space that they affect. The earth on the other hand will affect your compass, because you are in its (fields) area of affect.

There are also potential medical benefits (1)

flopsy mopsalon (635863) | about 11 years ago | (#6897940)

The health benefits of magnet therapy [] , useful in the treatment of everything from carpal tunnel syndrome to back pain, are well known.

It is great that such breakthroughs in magentic technology are being made, and I hope that these gains can be put to use in the medical field, especially now with so much of the poplulation entering old age.


Anonymous Coward | about 11 years ago | (#6897953)

OMFG MAGENT THERPAY is ALMOST as good as getting rid of my Thetans!!

Re:There are also potential medical benefits (3, Interesting)

dbIII (701233) | about 11 years ago | (#6897981)

The health benefits of magnet therapy, useful in the treatment of everything from carpal tunnel syndrome to back pain, are well known.
That is entirely true - those that sell the things to the credulous can afford a high standard of health care.

If you are old enough to read this and comprehend words such as "carpal" you are most likely older than the whole magnetic scam - unless you include the last time this was done by discredited folks such as Mesmer well over a century back (yes - it was a joke then too and only belonged in horror novels).

Re:There are also potential medical benefits (1)

LordLucless (582312) | about 11 years ago | (#6897991)

Yeah, my grandpa sleeps with a magnet-studded blanket under him. I'm gonna have to buy him one of these babies for Christmas.

No more arthritis Grandpa?

Schtarker! (0)

Anonymous Coward | about 11 years ago | (#6897945)

So is this fecker stronger than the one Siegried used to pull navy ships to their graves?

Re:Schtarker! (1)

bakes (87194) | about 11 years ago | (#6898175)

Perhaps, but remember that Max's mini-magnet was stronger than the maxi-magnet.

WOW! (-1, Offtopic)

toxic666 (529648) | about 11 years ago | (#6897972)

More flamebait, feel free to mod as such.

"My Kenpo teacher just set some world records. The articles don't say much about how innovative this technology is, but post it on Slashdot because it is r34l k3wl. It's more powerful, so its n3ws f0r n3rdz. There's not much to review about methodologies, but its k3wl. It's almost as k3wl as C0ld Fu2i0n.

Please thank my Kenpo teacher and make sure to let him know I got him this free advertising. Next week I want to take the Whacking Day snake killing course and could use a discount."

Silly question from the ignorant (4, Interesting)

questamor (653018) | about 11 years ago | (#6897986)

Just curiously, if these fields are being generated as 500,000 times stronger than tha earth's own... are they detectable from space?

Re:Silly question from the ignorant (0)

Anonymous Coward | about 11 years ago | (#6897996)

Good question. Theres that whole knocking the moon out of earths orbit thing though...we have to deal with that first.

Re:Silly question from the ignorant (3, Informative)

DrLudicrous (607375) | about 11 years ago | (#6897998)

No. They are very localized spatially. You would not be able to feel their effects until you got within about 20-30 meters (that is a complete eyeball estimate, probably need to get closer). The Earth's magnetic field, while smaller in magnitude, is not as localized, hence a compass will work pretty much anywhere (except for the poles, where it just spins wildly while you walk in circles waiting for the arctic wolves to devour you).

Re:Silly question from the ignorant (1)

RevSmiley (226151) | about 11 years ago | (#6898086)

Well everytime they use that thing a black hole in my wall opens and an another fucking weirdo from some other time/space comes in here and I have to shoot him. I am running out of places to hide the freekng bodies. Please tell them to stop OK?

Re:Silly question from the ignorant (1)

Jonas the Bold (701271) | about 11 years ago | (#6898407)

Ah, a question from the ignorant, answered by the ignorant.

Not ignorant about magnetic fields, mind you, in that respect your answere was quite correct, although it would have benefited from the use of the term 'Inverse square law'.

Ignorant, only because there aren't any wolves at the poles. You would just freeze to death, and probably go a few thousand years frozen on the ground without getting eaten :)

Re:Silly question from the ignorant (1)

imsabbel (611519) | about 11 years ago | (#6898454)

Well, some goes to you.
Due the dipolar moment of the magnet, you dont have inverse square, but inverse cubed.

If it is a more complicated device (sextupol, ect), there can be even higher falloff exponents.

Re:Silly question from the ignorant (1)

Jonas the Bold (701271) | about 11 years ago | (#6898474)

Note to self: Fact check when being pedantic.

Re:Silly question from the ignorant (0)

Anonymous Coward | about 11 years ago | (#6898229)

Didn't you notice your CRT going all wacko every time they turn one on?

Re:Silly question from the ignorant (1)

jpop32 (596022) | about 11 years ago | (#6898274)

Just curiously, if these fields are being generated as 500,000 times stronger than tha earth's own... are they detectable from space?

Somewhere in the deep space, a red light starts blinking...

World record? Where? (3, Interesting)

earthy (11491) | about 11 years ago | (#6898008)

Now, I may be just stupid, but I'd say the people at the
High Field Magnet Laboratory [] in Nijmegen have a much stronger claim
to world records... (33T continuous, 60T pulsed).

Where is the world record?

Re:World record? Where? (3, Informative)

wakaranai (87059) | about 11 years ago | (#6898044)

I think FSU are only claiming the record for a *superconducting* magnet, not for the highest continuous magnetic field generated using a hybrid magnet.

So yes... relatively speaking, I'm not so sure the FSU's world record is so impressive. Guess this advance could lead to advances in hydrid magnets though...?

Frogs (1)

wakaranai (87059) | about 11 years ago | (#6898054)

oh yes... this was the Dutch lab that made headlines a few years ago by levitating frogs :-)

frog movies []

Re:World record? Where? (0)

Anonymous Coward | about 11 years ago | (#6898374)

The US NHMFL has a hybrid magnet that is capable of continuous operation at 45 Tesla. The problem with resistive magnets (including hybrid magnets) is that magnetic field fluctuations due to the power supply and the cooling system are too big (~1ppm is too big) to allow high resolution spectroscopy (NMR). People are working on ways to compensate for the field fluctuations, but until then, a 25 Tesla supercon is big news!

In Other News... (5, Funny)

insane8 (563668) | about 11 years ago | (#6898013)

None of my credit cards seem to be working anymore...

Re:In Other News... (2, Interesting)

DrLudicrous (607375) | about 11 years ago | (#6898047)

This is a constant worry/annoyance to those of us that work with high-field magnets. I never can tell if my credit card is not working because the machine is flaky, or because I forgot to take my wallet out before I started working around the magnet. And you can't remagnetize the cards, which means you have to go get all new stuff.

On the bright side of things, this is a great way to circumvent those drivers license scanners bouncers use at bars to record who has stepped in to drink- a sign of Big Brother if you ask me. I think I will erase my drivers license's striope tomorrow...

31 T (or greater) Hybrid Magnets (3, Interesting)

wakaranai (87059) | about 11 years ago | (#6898019)

It's possible to go to generate higher continuous (i.e. as opposed to pulsed) magnetic fields, using hydrids of superconducting and electromagnets.

I saw a hybrid magnet in the Insitutue of Materials Research (KINKEN) in Tohoku University (Sendai, Japan) with a maximum field of 31 T.

I got the impression that there are other devices (worldwide) with even higher continuous fields.

FSU Football Team (2, Funny)

Catharz (223736) | about 11 years ago | (#6898022)

Why don't they just spike the football and turn this on at one end of the stadium?

Clowns doing Physics? (-1, Troll)

Anonymous Coward | about 11 years ago | (#6898026)

FYI: the NHMFL is operated by the University of Florida, FSU, and Los Alamos National Labs -- not just FSU. To give all the credit to a clown college [] like FSU is a disgrace to real research institutions [] like UF.

Yeah, this AC is biased by being a UF grad. But c'mon... you really can major in clowning there. How much research would they get done if they were left alone?

College Sports (0, Offtopic)

Jeppe Salvesen (101622) | about 11 years ago | (#6898050)

What the hell? Colleges are supposed to be where you develop your intellect! This achievement is several orders of magnitude greater that winning some dinky college league!

(Ok - we also develop our beerguts and identities in college, but the College itself does not sponsor that)

Glad he's not an english major (1)

mcpkaaos (449561) | about 11 years ago | (#6898060)

You maybe some of you can think of something clever.

He sounds like one of the Cosby kids: "You said for to not for to drink your dreeeenk!"

Just keep it away from my hardrive (-1, Redundant)

Anonymous Coward | about 11 years ago | (#6898080)

my porn and warez collection is too valuable to lose

But did they check properly? (3, Funny)

adeyadey (678765) | about 11 years ago | (#6898168)

By holding a piece of paper over it and sprinkling some iron filings?

new MRI application? (1)

zarniwhoop (698439) | about 11 years ago | (#6898176)

I am bit of a dummy here but... I have always wondered if it is possible to use MRI to 'scan' trucks, cars even people at ports - to check for contraband? does the ability to generate such large fields bring such application closer or am i talking hogwash?

Re:new MRI application? (2, Informative)

n0mad6 (668307) | about 11 years ago | (#6898478)

Perhaps if you were only in the business of scanning plastic containers for contraband...and sort of ferromagnetic material that you would "scan" using a magnet in the multi-tesla reigon would be subject to becoming deadly projectiles.

Microwave gun would be cooler (1)

ExEleven (601282) | about 11 years ago | (#6898180)

I was thinking of getting a magtron out of a Microwave Oven and making a waveguide to aim it. It would become to bird hunting what nets are to fishing. Or just use them to boost your ability to send things with WiFi. (Microwave Ovens are on the same freqency as WiFi, 2.4ghz, only with 900whatts not 500mw)

er.. (1)

adeyadey (678765) | about 11 years ago | (#6898185)

But just imagine a Beowulf clust.. arrg..
(sound of gun shot off stage)

Badly-written item - where is FSU? (0)

Anonymous Coward | about 11 years ago | (#6898231)

There are many FSU's. Next time, state which one.

Energy storage/regulation applications.. (4, Interesting)

adeyadey (678765) | about 11 years ago | (#6898400)

Perhaps, after the recent power outages in the US, the most important application of supercoducting magnets could be power storage. There seem to be 2 ways they are used - either to make friction-free magnetic bearings for traditional flywheel systems, or (more interesting) direct short-term storage of power. For situations where you need to temporarily store a *lot* of power this is an interesting technology alternative to batteries/hydro/etc.. Current devices seem to cover mainly very short term variations, but what about covering longer term regulation (hours/days) of variable power from a wind-farm, or solar, for example?

Anyone got more gen on this?

Try Superconducting Magnetic Energy Storage (SMES) Systems []

This link [] describes a commercial device that stores 3 megawatt-seconds..

clarification (2, Informative)

GarbanzoBean (695162) | about 11 years ago | (#6898683)

This is a record field for the superconducting magnet, not for the whole system. FSU magnet lab does hold the record for hightest DC (constant) magnetic field 50T. This is achieved by putting a resistive magnet inside a superconducting magnet. Resistive magnet burns a lot of energy (10MW), but one cannot use superconducting alone; once the current (magnetic field is proportional to it) reaches a certain value, the superconducting material becomes normal. The record up to now has been something like 14T for superconducting magnet (outsert), the new outsert will allow the DC fields in that lab to go up to 60T.

WoooHoo (0)

His name cannot be s (16831) | about 11 years ago | (#6898698)

That's great news for super-duct-work-activity! :p

Tallahassee (2, Funny)

rot26 (240034) | about 11 years ago | (#6898706)

Ya gotta love a town where you can buy draft beer by the gallon practically anywhere. BY the way FSU is one of the few universities with a full-time bail bondsman on staff.

Gay Goaters!!
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