A hybrid magnet in China has just smashed the previous record for the most powerful stable magnetic field, scientists claim.
At the Chinese Academy of Sciences' Steady High Magnetic Field Facility , a magnet years in development achieved a steady magnetic field of 45.22 tesla – tens of thousands of times more powerful than your average souvenir fridge magnet.
Both the MagLab and SHMFF research teams have been working on their own hybrid magnets for some time. This is a magnet that uses two different ways of creating a magnetic field: an outer superconducting ring, and an inner resistive Bitter magnet . Each of these technologies have their own limitations: the superconducting magnet has low power input needs, but an upper limit on magnetic field strength; the Bitter magnet requires a much higher power input.
"To achieve [a] higher magnetic field, we innovated the structure of the magnet, and developed new materials,", the academic director of High Magnetic Field Laboratory of Hefei Institutes of Physical Science, Chinese Academy of Sciences."The manufacturing process of the Bitter discs was also optimized."
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