Optimisation of composite superconducting bulks made from (RE)BCO coated conductor stacks using pulsed field magnetization modelling

11th European Conference on Applied Superconductivity

Patel, A.^1 ; Glowacki, B.A.^1,2,3

Applied Superconductivity and Cryoscience Group, Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge

CB2 3QZ, United Kingdom^1

Institute of Power Engineering, ul. Augustowka 6, Warsaw

02-981, Poland^2

Department of Physics and Energy, University of Limerick, Plassey, Ireland^3

关键词: Coated conductors;    Complete control;    Persistent currents;    Pulsed magnetization;    Pulsed-field magnetization;    Superconducting bulks;    Thermal modelling;    Transport currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/2/022024/pdf
DOI  :  10.1088/1742-6596/507/2/022024

来源: IOP

【 摘 要 】

Coated conductors, although designed to carry transport current, are ideally suited to carrying persistent current and can therefore be cut and stacked to form a type of composite bulk which has superior thermal properties compared to existing bulks despite having less than 2 % superconductor by volume. The magneto-thermal modelling reported follows on from previous experimental work on pulsed magnetization of a 12 mm square tape stack. The magnitude of the applied field has a strong effect on the trapped field and flux. The optimum applied field depends on sample height and the maximum trapped field and flux saturates as the height reaches the diameter of the stack. The nature of a composite bulk made from a stack of tapes gives complete control over the height of the stack which needs to be optimised for pulsed magnetization.