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Construction and test result of an all-REBCO conduction-cooled 23.5 T magnet prototype towards a benchtop 1 GHz NMR

Wooseung Lee¹, Dongkeun Park¹, Juan Bascuñán¹

¹Francis Bitter Magnet Lab/Plasma Science and Fusion Center, Massachusetts Institute of Technology, Massachusetts.

Superconductor Science & Technology

|September 19, 2022

Abstract:

A compact benchtop high-field REBCO NMR is one of the most promising HTS applications. An all-REBCO, conduction-cooled magnet is a very attractive design option for demonstrating the unique potential of REBCO for forefront magnets. In this research, we have successfully constructed and tested a prototype all-REBCO, conduction-cooled, 23.5 T magnet operating at 10 K. We have applied the concept of an extreme No-Insulation (NI) winding technique, coupled with a solder-shunting procedure to improve magnet performance. We have also used a temperature-controlled charging sequence (TCCS) to reduce the screening current. The magnet was energized to 23.6 T at 14 K; it was further operated to 25 T at 10 K for nearly 60 hours.

Keywords:

All-REBCO magnet Benchtop NMR Cryogen-free High-field magnet

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