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Superconducting magnet breaks strength world record



  The Expulsion of a Magnetic Field from a Supercomputer at Argonne National Laboratory, Illinois

A powerful new magnet can create a stronger field Credit: Argonne National Laboratory / US Department of Energy / Science Photo Library

Scientists have created the world's most powerful superconducting magnet that can create a magnetic magnetic field intensity of 45.5 tesla. Only pulsed magnets that carry fields in a fraction of one second at a time have achieved higher intensities.

Materials Researcher David Larbalestier and his US National High Magnetic Field Laboratory (NHMFL) co-workers in Tallahassee, Florida, ran intense electrical currents through coils made of a coupled superconductor to generate low energy consumption magnetic fields. The resulting field strength exceeded that of energy-resistant resistive magnets ̵

1; which do not use superconductors – used by state-of-the-art magnetic tabs. It also outperformed conventional superconductor magnets and "hybrid" superconducting resistive magnets (see "Record breaking magnets"). The result was published June 12 in Nature 1 .


Source: Mark Bird, National High Magnetic Field Laboratory

Previously, cuprate-based magnets have been too fragile for use in technical applications, but the romance design should be able to maintain fields up to 60 tesla, Larbalestier says. Thousands of researchers take their examinations for magnetic installations such as NHMFL each year to conduct experiments with higher intensity fields than can be achieved in a typical laboratory.

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