Construction and test result of an all-REBCO conduction-cooled 23.5 T magnet prototype towards a benchtop 1 GHz NMR spectroscopy. (1st October 2022)

• Record Type: Journal Article
• Authors: Lee, Wooseung; Park, Dongkeun; Bascuñán, Juan; Iwasa, Yukikazu
• Is Part Of: Superconductor science & technology. Volume 35:Number 10(2022)
• Publication Date: 2022-10-01
• Subjects: all-REBCO magnet -- benchtop NMR cryogen-free -- high-field magnet; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/ac8773
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: A compact benchtop high-field REBCO nuclear magnetic resonance is one of the most promising high-temperature superconductor 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 winding technique, coupled with a solder-shunting procedure to improve magnet performance. We have also used a temperature-controlled charging sequence 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 h.