AC Loss, Inter-Strand Resistance, and Mechanical Properties of an Option-II ITER CICC up to 30,000 Cycles in the Press

作者：Miyoshi Y^*; Ilyin Y; Abbas W; Nijhuis A

来源：IEEE Transactions on Applied Superconductivity, 2011, 21(3): 1944-1947.

DOI：10.1109/TASC.2010.2088355

• CICC
• contact resistance
• coupling loss
• transverse load

In Nb(3)Sn cable-in-conduit conductors for ITER, the superconducting strands follow complex trajectories defined by the twist pitches of multi-stage cabling and the void fraction of the conductor. The conductor in operation suffers a Lorentz load which results in distributed strand deformations that alter the overall electromagnetic and mechanical behavior of the conductor. With the Twente cable press, a cable specimen is subjected to transverse load up to 30,000 cycles and the changes in the inter-strand contact resistances, the cable deformation, and the coupling loss are monitored. An ITER toroidal field coil conductor with option-II cabling scheme is tested for the first time in the press. In comparison with previously measured conductors, the long twist pitches of option-II result in a higher inter-strand contact resistance, a lower stiffness of the conductor, and initially a higher coupling loss time constant. Within 100 cycles, the time constant decays to a comparable level as the low void fraction conductor with short twist pitches.

• 出版日期2011-6