The EuCARD2 Future Magnets Program for Particle Accelerator High-Field Dipoles: Review of Results and Next Steps

Rossi, Lucio, Badel, Arnaud, Bajas, Hugues, Bajko, Marta, Ballarino, Amalia, Barth, Christian, Betz, Ulrich, Bottura, Luca, Broggi, Francesco, Chiuchiolo, Antonella, Dhalle, Marc, Durante, Maria, Fazilleau, Philippe, Fleiter, Jerome, Gao, Peng, Goldacker, Wilfried, Kario, Anna, Kirby, Glyn, Haro, E., Himbele, J., Lorin, C., Murtomaki, J., Van Nugteren, Jeroen, Petrone, Carlo, De Rijk, Gijs, Ruuskanen, J., Senatore, Carmine, Statera, Marco, Stenvall, Antti, Tixador, Pascal, Yang, Yifeng, Usoskin, Alexander and Zangenberg, Nikolaj (2018) The EuCARD2 Future Magnets Program for Particle Accelerator High-Field Dipoles: Review of Results and Next Steps. IEEE Transactions on Applied Superconductivity, 28 (3), [4001810]. (doi:10.1109/TASC.2017.2784357).

Abstract

The EuCARD2 collaboration aims at the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, to be tested in small coils and magnets capable to deliver 3-5 T when energized in stand-alone mode, and 15-18 T when inserted in a 12-13 T background magnet. REBCO tape, assembled in a Roebel cable, was selected as conductor. The developed REBCO tape has reached a record engineering critical current density, at 4.2 K and 18 T of 956 A/mm2. Roebel cable carried up to 13 kA at 20 K when tested in a small coil (FeatherM0.4). Then a first dipole magnet, wound with two low-grade Roebel cables of 25 m each, was assembled and tested. The dipole reached the short sample critical current of 6 kA generating more than 3 T central field at about 5.7 K, with indications of good current transfer among cable strands and of relatively soft transition. The construction of a costheta dipole is also discussed. Eucard2 is reaching its objective and is continuing with the H2020-ARIES program aiming at doubling the Je at 20 T to obtain 6 T as standalone and 18 T as insert in a high field facility.

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Contributors

Author: Yifeng Yang

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