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25 Tesla, world-record 'split magnet' makes its debut
Date:7/13/2011

ck Toth of the Magnet Science and Technology staff.

The magnet's design required Toth's team to rethink the structural limits of resistive magnets that is, those in which the magnetic field is produced by the flow of electric current. The project required that the engineers invent, patent and find sometimes-elusive builders for the technology that could carry their idea through. The result of their work, the new split magnet, features four large elliptical ports that provide scientists with direct, horizontal access to the magnet's central experimental space, or bore, while still maintaining a high magnetic field.

High-powered research magnets are created by packing together dense, high-performance copper alloys and running an electrical current through them. All of the magnet's forces are focused on the center of the magnet coil right where Toth and his team engineered the four ports. Building a magnet system with ports strong enough to withstand such strong magnetic fields and such a heavy power load was once considered impossible.

To accomplish the impossible, Toth's team cut large holes in the mid-plane of the magnet to provide user access to the bore but maintain a high magnetic field. All of this had to be done while supporting 500 tons of pressure pulling the two halves of the magnet together and, at the same time, allowing 160,000 amps of electrical current and 3,500 gallons of water per minute to flow through the mid-plane. (The water is needed to keep the magnet from overheating.)

While the technological breakthroughs enabling the magnet's construction are important, the multidisciplinary research possibilities are even more exciting. Optics researchers in chemistry, physics and biology are poised to conduct research using the split magnet, while others are optimistic about the potential for breakthroughs in nanoscience and semiconductor research.

The magnet's first user, a scientist from Kent State University
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Contact: Jack Toth
toth@magnet.fsu.edu
850-644-0854
Florida State University
Source:Eurekalert  

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