Properties of the LHD plasmas with a large island-super dense core plasma and island healing

N. Ohyabu, T. Morisaki, S. Masuzaki, R. Sakamoto, M. Kobayashi, J. Miyazawa, M. Shoji, H. Funaba, J. H. Harris, Y. Hirooka, S. Inagaki, K. Itoh, K. Narihara, N. Nakajima, Y. Narushima, S. Ohdachi, B. Peterson, S. Sakakibara, R. Sanchez, K. TanakaK. Watanabe, M. Yokoyama, K. Ida, T. Shimozuma, H. Yamada, Y. Nagayama, O. Kaneko, T. Mutoh, K. Kawahata, A. Komori, S. Sudo, O. Motojima

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In local island (m/n = 1/1) divertor discharges in the large helical device a stable super dense core plasma develops when a series of pellets are injected. A core region with a density as high as 4.6 × 1020 m-3 and a temperature of 0.85 keV is maintained by an internal diffusion barrier with a very high density gradient. In a study of island dynamics, we find that an externally imposed large island (m/n = 1/1) as large as 15% of the minor radius is healed when beta at the island exceeds a critical value.

Original languageEnglish
Pages (from-to)B383-B390
JournalPlasma Physics and Controlled Fusion
Issue number12 B
Publication statusPublished - Dec 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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