2013 Optimization of interstrand coupling loss and transverse load degradation in ITER Nb3Sn CICCs

A. Nijhuis, G. Rolando, C. Zhou, E.P.A. van Lanen, J. van Nugteren, R.P. Pompe van Meerdervoort, H.J.G. Krooshoop, W.A.J. Wessel, A. Devred, A. Vostner, I. Pong

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

For the ITER Central Solenoid (CS), with Nb 3 Sn CICCs that operate under fast ramping conditions, the selection of the twist pitch lengths can have a significant impact on the performance. The critical current and temperature margin are influenced by the thermal contraction of the composite materials, the transverse electromagnetic forces, and coupling currents. The numerical cable model JackPot-ACDC is developed to calculate the interstrand coupling loss for any time-dependent current and magnet field for all strand trajectories in a CICC. It was a priori predicted that the amount of coupling loss and critical current degradation is subject to interference due to different subcable twist pitches. Here test results are discussed of the ITER CS conductor sample, manufactured according to the proposed design, optimizing the transverse load degradation, the temperature margin, and the coupling loss.
Original languageEnglish
Article number4201206
Number of pages6
JournalIEEE transactions on applied superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013

Keywords

  • CICC
  • CJackPot
  • Coupling loss
  • ITER
  • S coil

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