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Helical divertor in the large helical device

  • N. Ohyabu
  • , N. Noda
  • , Hantao Ji
  • , H. Akao
  • , K. Akaishi
  • , T. Ono
  • , H. Kaneko
  • , T. Kawamura
  • , Y. Kubota
  • , S. Morimoto
  • , A. Sagara
  • , T. Watanabe
  • , K. Yamazaki
  • , O. Motojima

Research output: Contribution to journalArticlepeer-review

Abstract

The large helical device (LHD), now under construction, is a heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is the existence of edge surface layers, a complicated three-dimensional magnetic structure. However, it does not seem to hamper the expected divertor functions. As a confinement improvement scheme in LHD, we have proposed a high temperature divertor plasma operation in which a divertor plasma with a temperature of a few keV, generated by efficient pumping, leads to the confinement improvement. Conceptual designs of the LHD divertor components are under way.

Original languageEnglish (US)
Pages (from-to)276-280
Number of pages5
JournalJournal of Nuclear Materials
Volume196-198
Issue numberC
DOIs
StatePublished - Dec 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • General Materials Science
  • Nuclear Energy and Engineering

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