A. Ballarino, S. Hopkins, B. Bordini, D. Richter, D. Tommasini, L. Bottura, M. Benedikt, M. Sugano, S. Kawashima, Y. Fukumoto, H. Sakamoto, H. Shimizu, V. Pantsyrny, I. Abdyukhanov, M. Shlyakov, C. Senatore, I. Shin, J. Kim, J. Lachmann, A. Leineweber, S. Pfeiffer, T. Baumgartner, M. Eisterer, J. Bernardi, A. Malagoli, V. Braccini, M. Vignolo, M. Putti, C. Ferdeghini:
"The CERN FCC Conductor Development Program: A Worldwide Effort for the Future Generation of High-Field Magnets";
IEEE Transactions on Applied Superconductivity, 29 (2019), 5; S. 1 - 9.

Kurzfassung englisch:
The study of next-generation high-energy accelerators
based on 16 T dipoles has emphasized the need for higher
performance, cost-effective Nb3Sn superconducting wires. A Conductor
Development Program aiming to reach a non-copper critical
current density (Jc) of 1500 A/mm2 at 16 T and 4.2 K has
been launched by CERN, with the involvement of industry and
laboratories worldwide. In this paper, the targets and strategy of
the program are presented, with an overview of the wire layouts
and development activities being pursued by each partner, and the
latest characterization results are reported. Three of the four participating
manufacturers have successfully reached the first-stage
Jc milestone, but a significant advance is still needed to achieve the
final target. The next steps are briefly discussed, as the program
focuses increasingly on novel alloys and methods to maximize Jc.

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