Recent Results in Large Helical Device

Y. Nagayama, K. Ikeda, A. Komori, R. Kumazawa, S. Morita, N. Ohyabu, B. J. Peterson, S. Sakakibara, T. Shimozuma, H. Yamada, N. Ashikawa, H. Chikaraishi, M. Emoto, H. Funaba, P. Goncharov, M. Goto, Y. Hainada, K. Ida, T. Ido, H. IgamiS. Imagawa, S. Inagaki, A. Isayama, M. Isobe, A. Iwamoto, O. Kaneko, K. Kawahata, T. Kobuchi, Y. Kogi, S. Kubo, A. Mase, S. Masuzaki, K. Matsuoka, T. Minami, T. Mito, J. Miyazawa, T. Morisaki, S. Murakami, S. Muto, T. Mutoh, Y. Nakamura, H. Nakanishi, K. Narihara, Y. Narushima, A. Nishimura, K. Nishimura, A. Nishizawa, N. Noda, T. Notake, H. Nozato, S. Ohdachi, Y. Oka, M. Osakabe, S. Okajima, T. Ozaki, A. Sagara, K. Saito, M. Sakamotos, R. Sakamoto, M. Sasao, K. Sato, T. Seki, M. Shoji, S. Sudo, H. Suzuki, K. Takahata, Y. Takeiri, H. Takenaga, N. Tamura, K. Tanaka, K. Toi, T. Tokuzawa, Y. Torii, K. Tsumori, T. Uda, K. Y. Watanabe, I. Yamada, K. Yamazaki, N. Yanagi, M. Yokoyama, Y. Yoshimura, Y. Yoshinuma, T. Watari, O. Motojima

研究成果: 書籍/レポート タイプへの寄稿会議への寄与


This paper presents recent experimental results in the Large Helical Device (LHD), which is the world largest helical system (Rax ∼ 3.6 m, aav ∼ 0.6 m, Bax ∼ 2.75 T) and has capability of steady state operation because of the super conducting magnets. LHD confines the plasma with Tio ∼ 2 keV and ne ∼ 0.8 x 1019 m -3 for 1905 sec using the ICRF heating. In this case, the total plasma heating energy was ∼ 1.3 GJ. This indicates that high energy ions generated by ICRF is well confined. Large magnetic island in the vacuum field due to the error field is vanished in plasma with higher temperature or with higher beta, so the error field is not an issue in helical systems. The obtained averaged beta is more than 4.3 % in LHD. Since the beta is not limited by the MHD events or magnetic island but the beta is limited by the lack of heating power, further improvement of beta can be expected. Internal and external transport barrier have been also observed, and the electron temperature and the ion temperature exceed 10 keV in the improved confinement mode in LHD. Besides the potential of the disruption free steady stated operation, LHD experiment accumulates evidences so that fusion reactor becomes more realistic.

ホスト出版物のタイトル21st IEEE/NPS Symposium on Fusion Engineering, SOFE'05
出版ステータス出版済み - 2006
イベント21st IEEE/NPS Symposium on Fusion Engineering, SOFE'05 - Knoxville, TN, 米国
継続期間: 9月 26 20059月 29 2005


名前Proceedings - Symposium on Fusion Engineering


その他21st IEEE/NPS Symposium on Fusion Engineering, SOFE'05
CityKnoxville, TN

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学


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