R K Maix et al 2006 J. Phys.: Conf. Ser. 43 753 doi:10.1088/1742-6596/43/1/184
R K Maix2, V Bagnato3, M Fricke1, K Heyn4, T Kluck1, F Lange5, K Riße1, C Sborchia7 and N Valle6
Show affiliationsThe magnet system of the W7-X Stellarator consists of 50 non-planar and 20 planar coils. The superconductors for both types have the same design, which is a Cable-in-Conduit (CIC) conductor of 243 NbTi strands. Namely the non-planar coils asked for a conductor, which can be easily wound to a complex shape, but has high mechanical strength to resist the large magnetic forces acting during magnet operation. This has been achieved by jacketing the cable into an Aluminium conduit by a co-extrusion process. The used 6063 Aluminium alloy is very soft in the extruded state, but gets high strength properties after winding during a precipitation hardening treatment at about 160°C. The production of the needed 390 conductor lengths (including spares) and the related QA tests are nearly completed and a large number of coils are fabricated. Some of them were already subjected to a cold test at CEA Saclay, where the conductor behaved as expected from short sample measurements.
84.71.Ba Superconducting magnets; magnetic levitation devices
52.55.Hc Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices
85.25.Am Superconducting device characterization, design, and modeling
Issue 1 (2006)
R K Maix et al 2006 J. Phys.: Conf. Ser. 43 753
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