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.
Tom Painter | EurekAlert!
Signaling Pathways to the Nucleus
19.03.2018 | Albert-Ludwigs-Universität Freiburg im Breisgau
In monogamous species, a compatible partner is more important than an ornamented one
19.03.2018 | Max-Planck-Institut für Ornithologie
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
19.03.2018 | Physics and Astronomy
19.03.2018 | Materials Sciences
19.03.2018 | Event News