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Frequency-dependent demagnetisation rate of a shielded HTS tape stack

Published version
Peer-reviewed

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Authors

Tomkow, Lukasz 
Climente-Alarcon, Vicente 
Mineev, Nikolay 
Smara, Anis 
Glowacki, Bartek A. 

Abstract

Abstract: This work presents results of investigation of crossed-field demagnetization in 2G high temperature superconducting stacks at temperatures in the range of 77 - 20 K and in a variable frequency, corresponding to the particular rotor application. We propose a method to reduce the demagnetization rate for a given stack configuration necessary for the superconducting rotor operating at a cryogenic temperature. This technique involves 3-D wrapping the stack of tapes with perpendicular layers of similar superconducting properties. Previous ‘proof of concept’ studies documented some improvements in flux demagnetisation reduction for basic configuration. In the present study a more advanced approach based on magnetic flux shielding is adopted. The presented results provide an important contribution to development for design solutions that aim to increase the operational time before remagnetisation of the stacks would be required.

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Paper

Journal Title

Journal of Physics: Conference Series

Conference Name

Journal ISSN

1742-6588
1742-6596

Volume Title

1559

Publisher

IOP Publishing