Design study of superconducting coils for the fusion DEMO plant at JAERI

T. Isono, N. Koizumi, K. Okuno, R. Kurihara, S. Nishio, K. Tobita

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)


A design study of the TF coil for the fusion DEMO plant at JAERI is in progress. A major issue is to estimate the maximum fields generated by the TF coils for three tokamak options and two conductor options. Three tokamak options are proposed varying the aspect ratio and the role of the CS coil. Two kinds of conductors using advanced superconducting materials are candidates for the TF coils: Nb3Al and high temperature superconductor (HTS). In order to evaluate achievable magnetic fields, a simple method was adopted to calculate mechanical properties. The estimated maximum fields are 17-20 T by the HTS conductor and 16-17 T by the Nb3Al conductor. There is a possibility of a 0.7 T enhancement using grading of Nb3Al winding.

Original languageEnglish
Pages (from-to)1257-1261
Number of pages5
JournalFusion Engineering and Design
Issue number8-14 PART B
Publication statusPublished - 2006 Feb
EventProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part B -
Duration: 2005 May 222005 May 27


  • Fusion DEMO plant
  • HTS
  • NbAl
  • Superconducting coil


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