1. Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets
- Author
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Junmyung Lee, Haigun Lee, B. H. Yoo, Do-Soon Hwang, Y G Kim, and Joonhee Kim
- Subjects
Superconductivity ,Pressing ,Materials science ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,chemistry.chemical_compound ,chemistry ,Magnet ,0103 physical sciences ,Magnesium diboride ,Development (differential geometry) ,Critical current ,Composite material ,010306 general physics ,0210 nano-technology ,Contact area ,Instrumentation ,Joint (geology) - Abstract
This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was
- Published
- 2018
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