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Title: Flux pumping for high-Tc superconducting (HTS) magnets
Author: Geng, Jianzhao
ISNI:       0000 0004 7224 6237
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2017
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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.
Supervisor: Coombs, Tim Sponsor: Cambridge Trust
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
Keywords: High-Temperature Superconductor ; flux pump ; magnets ; high magnetic field ; wireless charging ; dynamic resistance ; superconducting rectifier ; MRI/NMR