Presentation Information
[WBP2-08]PFM of trapped field magnets by a two-step crossed fields combination
*Difan Zhou1, Haoran Jiang1, Tianxin Lan1 (1. Shanghai University (China))
Keywords:
bulk superconductors,trapped fields,pulsed field magnetization
A reliable in-situ magnetization technique is crucial for exploiting the remarkable magnetic flux trapping capability of bulk superconductors in practical applications, such as NMR/MRI, superconducting rotating machines and superconducting undulators. It has been reported that the magnetization efficiency of bulk superconductors can be improved by exploiting flux jump. We propose a novel magnetization method named crossed pulsed fields magnetization (CPFM) and achieve experimentally, combining a transverse pulsed field magnetization (PFM) followed by a perpendicular PFM. The experimental results suggest that transverse pre-magnetization can reduce the perpendicular pulsed field required for magnetization by exceeding 1.2 T and increase the magnetization efficiency by approximately 9.5% both at 50 and 30 K, which is of great significance to the practical application of single grain YBCO bulk superconductors in electromagnetic devices.