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Magnet design with 100-kA HTS STARS conductors for the helical fusion reactor.

Author(s) : YANAGI N., TERAZAKY Y., ITO S., et al.

Type of article: Article

Summary

The high-temperature superconducting (HTS) option is employed for the conceptual design of the LHDtype helical fusion reactor FFHR-d1. The 100-kA-class STARS (Stacked Tapes Assembled in Rigid Structure) conductor is used for the magnet system including the continuously wound helical coils. Protection of the magnet system in case of a quench is a crucial issue and the hot-spot temperature during an emergency discharge is estimated based on the zero-dimensional and one-dimensional analyses.
The number of division of the coil winding package is examined to limit the voltage generation. For cooling the HTS magnet, helium gas flow is considered and its feasibility is examined by simple analysis as a first step.

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