Application of inter-linked superconducting coils for central solenoid and advanced divertor configuration of DEMO

Hiroyasu Utoh, Nobuyuki Asakura, Kenji Tobita, Yoshiteru Sakamoto, Youji Someya, Kazuo Hoshino, Makoto Nakamura

Research output: Contribution to journalArticle

2 Citations (Scopus)


To determine the engineering feasibility of an "inter-linked" (IL) superconducting central solenoid (CS) and poloidal field (PF) coil, we studied the basic engineering design of the IL-CS and PF coil. We were able to use IL superconducting coils in a tokamak fusion demonstration power plant (DEMO) reactor to achieve a sufficient amount of the CS magnetic flux swing for the current ramp-up while maintaining plasma size and also achieving an advanced divertor concepts of "super-X divertor (SXD)" by locating near the plasma. A basic idea of the IL superconducting CS and PF coil concept is to wind a CS (PF coil) such that it is linked in a set of toroidal field (TF) coils. In this study, we considered the conductor and feeder design of the IL-CS and PF coil including the superconducting strand type, cooling, and winding and assembly methods, and determined that react and wind Nb3Al is a candidate for use in an IL coil and feeder in this specification. This paper presents the preliminary engineering design results of the IL superconducting CS and PF coil for creating a SXD equilibrium configuration.

Original languageEnglish
Pages (from-to)2456-2460
Number of pages5
JournalFusion Engineering and Design
Issue number9-10
Publication statusPublished - 2014 Oct



  • Central solenoid
  • Fusion reactor design
  • Inter-linked
  • Magnetic flux swing
  • Super-X divertor
  • Superconducting magnet

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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