Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Volume 34, Issue 12, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6668/ac2ff1
Keywords
multifilamentary MgB2 wire; superconducting joint; MgB2 magnet; persistent-mode; persistent-current switch
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2020R1A6A3A01100198]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1A2C1013662]
- 2019 Research Grant (PoINT) from Kangwon National University
- National Research Foundation of Korea [2020R1A2C1013662, 2020R1A6A3A01100198] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The research focuses on improving the interconnection between multifilamentary wires in MgB2 magnets through a unique superconducting joint technique, resulting in high critical current and potential application in magnetic resonance imaging systems.
Persistent-mode operation is a key feature of magnetic resonance image systems to improve the required field stability. The superconducting joint is known to be beneficial for reducing all the resistant components in an electrically closed-circuit. The joint technique of magnesium diboride (MgB2) multifilamentary wire, however, is the main obstacle to the use of magnet in practical applications. In response, herein, we designed and developed a unique configuration of superconducting joint to further enhance the interconnection of exposed cores between two 18-multifilamentary wires. It was confirmed that developed joint samples achieved high critical current similar to a non-jointed wire. The proposed joint technique was directly applied to the MgB2 single-turn coil and MgB2 magnet for estimating a joint property through persistent-mode operation. This work provides fundamental insights into the design of persistent-mode MgB2 magnets to boost magnetic resonance image systems.
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