AI Article Synopsis
- A proposed superconducting joint architecture enables the connection of carbon-doped magnesium diboride (MgB) wires while effectively screening external magnetic fields for magnetic resonance imaging (MRI) applications.
- The architecture takes advantage of the natural diamagnetic properties of bulk MgB to create a magnetic field screening effect around the connection, achieving significant results in magnetic field suppression.
- The joint can withstand magnetic fields of up to 1.5 T at 20 K and 2 T at 15 K, maintaining a high critical current of 30.8 A and low resistance, making it promising for improving MRI magnet efficiency.
Article Abstract
A superconducting joint architecture to join unreacted carbon-doped multifilament magnesium diboride (MgB) wires with the functionality to screen external magnetic fields for magnetic resonance imaging (MRI) magnet applications is proposed. The intrinsic diamagnetic property of a superconducting MgB bulk was exploited to produce a magnetic field screening effect around the current transfer path within the joint. Unprecedentedly, the joint fabricated using this novel architecture was able to screen magnetic fields up to 1.5 T at 20 K and up to 2 T at 15 K and thereby almost nullified the effect of the applied magnetic field by maintaining a constant critical current (). The joint showed an of 30.8 A in 1.5 T at 20 K and an ultralow resistance of about 3.32 × 10 Ω at 20 K in a self-field. The magnetic field screening effect shown by the MgB joint is expected to be extremely valuable for MRI magnet applications, where the of the joints is lower than the of the connected MgB wires in a given magnetic field and temperature.
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| http://dx.doi.org/10.1021/acsami.1c19581 | DOI Listing |
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