Field Mapping of the Jointless HTS Solenoid Magnet in a Persistent Current Mode Operation

• Published in: IEEE transactions on applied superconductivity Vol. 29; no. 5; pp. 1 - 4
• Main Authors: Yoon, Miyeon, Lee, Seyeon, Park, Sang Ho, Lee, Ji-Kwang, Hong, Gye-Won, Choi, Kyeongdal, Hahn, Seungyong, Lee, SangGap, Han, Jun Hee, Kim, Woo-Seok
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-08-2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Closed loops; Coils; Conductors; High temperature; High-temperature superconductors; HTS; Liquid nitrogen; magnet; Magnetic field measurement; Magnetic fields; Magnetic flux; Magnetic resonance imaging; Mapping; MRI; NMR; persistent current; ReBCO; Silicon; Superconducting magnets
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2019.2898516

In order to achieve a persistent current mode operation with high-temperature superconducting (HTS) coils, we have been trying to improve the concept of a jointless HTS coil. The coil has a perfect closed loop without any joints in a coil, and we have proven that a persistent current can be induced in the coil by several charge up methods such as PCS, flux pump, or field cooling with a background magnet. In this paper, based on the previous experiment, which showed partially successful results [10], we designed and fabricated a small solenoid type jointless HTS magnet with a 100-m-long ReBCO wide conductor and tested it in a liquid nitrogen bath. After the persistent current mode operation of 15 h, we tried to measure temporal and spatial homogeneity by a field mapper we developed under the DSV of 10 mm .