Home | Community | Message Board

High Mountain Compost
Please support our sponsors.

General Interest >> Science and Technology

Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Jump to first unread post. Pages: 1
blasted chipmunk
 User Gallery

Registered: 09/18/03
Posts: 8,058
NSF Builds 21 Tesla Superconducting Magnet
    #2971841 - 08/06/04 01:51 PM (13 years, 9 months ago)


Tallahassee FL (SPX) Jul 27, 2004
The National High Magnetic Field Laboratory, funded by the National Science Foundation and the State of Florida, has achieved another world record in magnet development with the successful testing of its 21.1 Tesla, superconducting, ultra-wide bore, NMR magnet.
The magnet reached full field on July 21, 2004, and will remain at field for years - and even decades - to come. A team of engineers headed by Denis Markiewicz, Tom Painter, Iain Dixon, and Jim Ferner at the NHMFL developed, designed, manufactured, and tested the magnet system.

The product of this 13-year effort stands 16 feet tall, weighs over 30,000 pounds, and has a stored energy of 40 megajoules. No other magnet in the world can produce 21.1 Tesla for NMR and MRI science in a 105 mm warm bore.

NHMFL Director Greg Boebinger said, "This very powerful and ultra-wide bore magnet was an extremely challenging system to build, and it represents a significant engineering accomplishment.

It is the crown jewel of the laboratory's NMR spectroscopy and imaging program - a joint effort between the National High Magnetic Field Laboratory in Tallahassee and in Gainesville."

This accomplishment positions the NHMFL as an international leader in the development of high field superconducting magnet technology for magnetic resonance applications.

The magnet is a concentric assembly of ten superconducting coils connected in series and operated at 1.7 K (-456.6 Fahrenheit). Each coil is wound with a monolithic superconductor, composed of either niobium-tin (Nb3Sn) or niobium-titanium (NbTi) filaments in a copper matrix.

To support the magnetic loading, the coils are configured with stainless steel overbanding and are vacuum impregnated with cryogenically tough epoxy for structural support. The high current density coils produce a uniform field of 21.1 Tesla to one part in one billion in a volume 64 times larger than that of typical NMR systems.

Small adjustments to field homogeneity are achieved with a set of superconducting shim coils that fine tune the magnetic field. Fabrication of the NbTi and shim coils occurred in cooperation with an industrial partner, Intermagnetics General Corporation.

The achievement of producing a uniform 21.1 Tesla field in a warm bore of 105 mm is attributed to the development of state-of-the-art magnet technology at the NHMFL and in collaboration with industry.

"We are extremely excited about the prospects of exploring new avenues in chemical and biomedical science with this one-of-a-kind magnet system that will have an operating frequency of 900 MHz for Nuclear Magnetic Resonance (NMR) spectroscopy and Magnetic Resonance Imaging (MRI)," stated NMR Director Tim Cross.

The ultra-wide bore (105 mm) is the unique aspect of this magnet that will permit a much greater range of scientific experiments than would be possible in standard 52 mm bore magnets.

Science performed on this unique national resource will range from materials research to macromolecular biological structure determination and non-invasive magnetic resonance imaging of laboratory animals.

With this instrument, scientists from around the world as well as those at the NHMFL will be able to expand the horizons of scientific investigation with NMR and MRI technologies.

Post Extras: Print Post  Remind Me! Notify Moderator
Invisiblepoke smot!
floccinocci floofinator

Registered: 01/08/03
Posts: 5,235
Re: NSF Builds 21 Tesla Superconducting Magnet *DELETED* [Re: automan]
    #2976210 - 08/07/04 07:46 PM (13 years, 9 months ago)

Post deleted by poke smot!

Reason for deletion: x

Post Extras: Print Post  Remind Me! Notify Moderator
Welcome to Violence

Registered: 07/12/03
Posts: 5,381
Loc: the shores of Tripoli
Last seen: 5 years, 9 days
Re: NSF Builds 21 Tesla Superconducting Magnet [Re: poke smot!]
    #2978730 - 08/08/04 06:00 PM (13 years, 9 months ago)

Urban legend, although i'm not sure about magnets of that power.

I'm a nihilist. Lets be friends.

bang bang

Post Extras: Print Post  Remind Me! Notify Moderator
life in E minor
Male User Gallery

Registered: 06/07/01
Posts: 1,860
Loc: /export/home/Kremlin
Last seen: 4 months, 11 days
Re: NSF Builds 21 Tesla Superconducting Magnet [Re: d33p]
    #2978850 - 08/08/04 06:58 PM (13 years, 9 months ago)

thats not an urban legend at all. MR rooms are sealed off in no-ferrous rooms. If you bring in metal it will alter the clarity of the images, and just like if you pass a magnet over a credit card, it will be wiped. My boss has warned me and everyone else who ever gets near the MR that we use in the lab to dump everything out of our pockets.

"Human suffering has been caused because all too many of us cannot grasp that words are only tools for our use, and that the mere presence of a word in the dictionary does not mean it necessarily refers to something definitive in the real world"
--Richard Dawkins, "The Selfish Gene"

"It is the mind which creates the world about us, and even though we stand side by side in the same meadow, my eyes will never see what is beheld by yours."
-George Gissing

"Without a firm idea of himself and the purpose of his life, man cannot live, and would sooner destroy himself than remain on earth, even if he was surrounded by bread."
--Fyodor Dostoevsky

Post Extras: Print Post  Remind Me! Notify Moderator
tangential derivation
Male User Gallery

Registered: 04/17/01
Posts: 20,637
Loc: Ontario, Canada Flag
Re: NSF Builds 21 Tesla Superconducting Magnet [Re: Kremlin]
    #2979130 - 08/08/04 09:14 PM (13 years, 9 months ago)

I had an MRI once and the guy doing the scan let me bring a quarter in to feel the force of the magnets (4 Tesla). I can see why they don't let you in there with metal: it tries to fly straight through the tunnel!

From here:

Missile Effect:

Any ferromagnetic material will be attracted to the magnetic. Scissors, IV poles, monitors and stretchers have ?flown? through the air to the magnetic. Several years ago in the USA, a child was killed when an oxygen cylinder was carried into the magnet room, and flew into the magnet crushing him.

Once, men turned their thinking over to machines in the hope that this would set them free.
But that only permitted other men with machines to enslave them.

Post Extras: Print Post  Remind Me! Notify Moderator
Error: divide byzero

Folding@home Statistics
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 1 day, 20 hours
Re: NSF Builds 21 Tesla Superconducting Magnet [Re: d33p]
    #2980736 - 08/09/04 09:38 AM (13 years, 9 months ago)

> Urban legend, although i'm not sure about magnets of that power.

I have seen a one close to that large in operation... not an urban legend. The damn thing pulled the water pipes out of the floor the first time we turned it on. This was at Argonne Nation Labs back in the early 90's. We had paperclips hanging from string tied to both the floor and ceiling around the magnet out about three meters. When the magnet was on, the clips would follow the magnetic fields.. very cool stuff. The magnet itself was about the size of a minibus.

This was about the time that Hunt for Red October came out. We were able to duplicate the 'hydrodrive' from the movie using our magnet. Using a closed loop of simulated sea water, and a dipole down the axis of the magnet, we were able to accelerate the water flow to about 60 MPH. Cavatation was a huge problem, though I heard that they figured out a way around it later in the year (after I left the program).

Just another spore in the wind.

Post Extras: Print Post  Remind Me! Notify Moderator
Jump to top. Pages: 1

General Interest >> Science and Technology

Similar ThreadsPosterViewsRepliesLast post
* The Poor-Man's Tesla Coil (in progress)
( 1 2 3 4 all )
trendalM 6,852 64 09/17/07 12:17 PM
by MrKite1
* Build an Electronic Brain Stimulator
( 1 2 all )
micro 10,061 25 08/02/04 08:51 AM
by phalloidin
* OT Tesla reite 975 2 09/02/02 07:20 PM
by reite
* building a electrokinetic device aka Lifter
( 1 2 3 4 5 all )
Eightball 13,030 82 12/17/06 09:40 AM
by trendal
* tesla: anyone ever built a plasma ball or jacobs ladder? eric_the_red 3,335 18 04/23/03 04:46 AM
by atomikfunksoldier
* "Natural" magnets. Gomp 951 9 01/14/07 10:08 PM
by Disco Cat
* Plastic Magnets - Strength Tuned with Different Colored Lasers.... PhanTomCat 570 0 05/13/07 08:14 PM
by PhanTomCat
* Nikola Tesla's flying machine Ego Death 1,466 5 06/08/07 01:11 AM
by lavod

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Lana, trendal, automan
1,040 topic views. 0 members, 2 guests and 2 web crawlers are browsing this forum.
[ Toggle Favorite | Print Topic | Stats ]
Search this thread:
Please support our sponsors.

Copyright 1997-2018 Mind Media. Some rights reserved.

Generated in 0.034 seconds spending 0.008 seconds on 19 queries.