Simulation study of power load with impurity seeding in advanced divertor "short super-X divertor" for a tokamak reactor

N. Asakura, K. Hoshino, K. Shimizu, K. Shinya, H. Utoh, S. Tokunaga, K. Tobita, N. Ohno

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Abstract A short super-X divertor (SXD) is proposed as an option for the Demo divertor, where the field line length from the divertor null to the outer target was largely increased compared to a similar-size conventional divertor. Physics and engineering design studies for a 3 GW-level fusion power Demo reactor (SlimCS) (Tobita et al., 2009) have recently progressed. Minimal number of the divertor coils were installed inside the toroidal field coil, i.e. interlink-winding. Arrangement of the poloidal field coils and their currents were determined, taking into account of the engineering design such as vacuum vessel and the neutron shield structures, and the divertor maintenance scenario. Divertor plasma simulation showed that significant radiation region is produced between the super-X null and the target. Radiation loss in the divertor was increased, producing fully detached plasmas efficiently. Advantages of the short SXD were demonstrated, but the total peak heat load was a marginal level (10 MW m-2) for the engineering design.

Original languageEnglish
Article number48929
Pages (from-to)1238-1242
Number of pages5
JournalJournal of Nuclear Materials
Volume463
DOIs
Publication statusPublished - 2015 Jul 22
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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