CERN Accelerating science

Article
Report number	CERN-ACC-2016-0044
Title	Magnetization Losses of Roebel Cable Samples with 2G YBCO Coated Conductor Strands
Author(s)	Yang, Y. (Southampton U.) ; Pelegrin, J. (Southampton U.) ; Falorio, I. (Southampton U.) ; Young, E.A. (Southampton U.) ; Kario, A. (KIT, Karlsruhe) ; Goldacker, W. (KIT, Karlsruhe) ; Dhallé, M. M. J. (Twente U., Enschede) ; van Nugteren, J. (Twente U., Enschede) ; Kirby, G. (CERN) ; Bottura, L. (CERN) ; Ballarino, A. (CERN)
Publication	2016
Imprint	2015-08-31
In:	IEEE Trans. Appl. Supercond. 26 (2016) 8202105
In:	12th European Conference on Applied Superconductivity, Lyon, France, 06 - 10 Sep 2015, pp.8202105
DOI	10.1109/TASC.2016.2525926
Subject category	Accelerators and Storage Rings ; 10: Future Magnets (MAG) ; 10.3: 5 T HTS Dipole Magnet Design and Construction
Abstract	Roebel cable with 2G YBCO strands is one of the promising HTS solutions of fully transposed high current conductors for high field accelerator magnets. Following the considerable research effort on the manufacturing of Roebel cables in recent years, sample conductors are now available in useful lengths with reproducible performances to allow detailed characterizations beyond the standard critical current measurements. The ac loss and strands coupling are of significant interest for the field quality of the accelerator magnets. We report a set of systematic ac loss measurements on two different Roebel cable samples prepared for the EuCARD2 collaboration. The measurements were performed over a wide range of temperature between 5 K and 90 K and the results were analyzed in the context of strands architecture and coupling. The results show that the transposed bundles are partially decoupled and the strands in transposition sections behave as an isolated single tape if the strands are insulated.
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