Overview of progress in LHD experiments

A. Komori, T. Morisaki, T. Mutoh, S. Sakakibara, Y. Takeiri, R. Kumazawa, S. Kubo, K. Ida, S. Morita, K. Narihara, T. Shimozuma, K. Tanaka, K. Y. Watanabe, H. Yamada, M. Yoshinuma, T. Akiyama, N. Ashikawa, M. Emoto, H. Funaba, M. GotoT. Ido, K. Ikeda, S. Inagaki, M. Isobe, H. Igami, K. Itoh, O. Kaneko, K. Kawahata, T. Kobuchi, S. Masuzaki, K. Matsuoka, T. Minami, J. Miyazawa, S. Muto, Y. Nagayama, Y. Nakamura, H. Nakanishi, Y. Narushima, K. Nishimura, M. Nishiura, A. Nishizawa, N. Noda, S. Ohdachi, Y. Oka, M. Osakabe, N. Ohyabu, T. Ozaki, B. J. Peterson, A. Sagara, K. Saito, R. Sakamoto, K. Sato, M. Sato, T. Seki, M. Shoji, S. Sudo, N. Tamura, K. Toi, T. Tokuzawa, K. Tsumori, T. Uda, T. Watari, I. Yamada, M. Yokoyama, Y. Yoshimura, O. Motojima, C. D. Beidler, T. Fujita, A. Isayama, Y. Sakamoto, H. Takenaga, P. Goncharov, K. Ishii, M. Sakamoto, S. Murakami, T. Notake, N. Takeuchi, S. Okajima, M. Sasao

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18 Citations (Scopus)


Remarkable progress to access the reactor-relevant regime has been made in a recent experiment in the Large Helical Device. Optimizing the rotational transform, the average beta value of 4.3%, which is the highest record among helical devices, was achieved. The high-performance plasma with a fusion triple product up to ∼2.2×1019 m-3·keV·s was sustained for >7 s by repetitive hydrogen pellet injection. With regard to steady-state operation, which is one of the key issues to realize a fusion reactor, discharges for >30 min were successfully sustained by ion cyclotron range of frequency heating with the aid of the magnetic axis swing technique to reduce the heat load to the plasma-facing component. In the discharge, the total input energy to the plasma reached 1.3 GJ, which also established a new record.

Original languageEnglish
Pages (from-to)136-145
Number of pages10
JournalFusion Science and Technology
Issue number2
Publication statusPublished - Aug 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • General Materials Science
  • Mechanical Engineering


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