Abstract— EuCARD-2 is a project partly supported by FP7-EuCARD2 n.312453 Commission aiming at exploring accelerator magnet technology for 20 T dipole operating fields. The EuCARD-2 collaboration is liaising with similar programs for high field magnets in the USA and Japan. EuCARD-2 focuses, through the work-package 10 “Future magnets”, on the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, for a 5 T stand-alone dipole of 40 mm bore and about 1 m length, named “FeatherM2”. After stand-alone testing, the magnet will possibly be inserted in a large bore background dipole, to be tested at a peak field up to 18 T.
After the successful testing of the subscale test coil named FeatherM0.4 achieving 13 kA @ 20º K. This confirm the assembly philosophy for the full EuCARD2 five Tesla dipole magnet. This paper presents the detailed magnet assembly of FeatherM2. We describe cable preparation for winding, the winding process, integration of instrumentation, impregnation procedure, magnet assembly, the challenging detailed design and procedure for jointing the multi strand REBCO Roebel 13 KA high current connections. Then we present the variable temperature magnet testing from 80ºK in gas, down to 4ºK in liquid powering. Culminating in magnetic field measurements using high speed rotating probes to measure magnetic field quality during magnet ramping.
Finally we discuss the important impact of this development for future Ultra High-field accelerator magnets. We discuss the next steps in the future development of such magnets.