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Flux Pumping for High-Tc Superconducting (HTS) Magnets

by Jianzhao Geng

Institution:	University of Cambridge
Year:	2017
Keywords:	High-Temperature Superconductor; flux pump; magnets; high magnetic field; wireless charging; dynamic resistance; superconducting rectifier; MRI/NMR
Posted:	02/01/2018
Record ID:	2183832
Full text PDF:	https://www.repository.cam.ac.uk/handle/1810/268221

Abstract

High Tc superconductors are enabling in the generation of extremely high magnetic fields. Flux pumping is a promising technology which can be used to operate HTS magnets without significant loss. In this decade, several HTS flux pumps based on travelling magnetic waves have been developed, yet their physics is still unclear. This thesis established a framework in the area of flux pumping for HTS coils. It revealed the underlying physics of existing travelling wave flux pumps, which is an important theoretical contribution. Based on the thorough understanding of flux pumping mechanism, the author proposed two novel types of flux pumps. The new inventions make flux pumping much easier, more controllable, and much less energy consuming. These flux pumps may promote the future applications of HTS magnets. This thesis can be a guidebook for researchers and engineers in developing flux pumps.