Island Dynamics in the Large-Helical-Device Plasmas

N. Ohyabu, K. Ida, T. Morisaki, K. Narihara, A. Komori, K. Watanabe, Y. Narushima, Y. Nagayama, M. Shoji, M. Emoto, H. Funaba, M. Goto, H. Idei, K. Ikeda, S. Inagaki, N. Inoue, M. Isobe, K. Khlopenkov, A. Kostrioukov, S. KuboR. Kumazawa, S. Masuzaki, T. Minami, J. Miyazawa, S. Morita, S. Muto, T. Mutoh, S. Murakami, Y. Nakamura, H. Nakanishi, K. Nishimura, N. Noda, K. Ohkubo, S. Ohdachi, Y. Oka, M. Osakabe, T. Ozaki, B. J. Peterson, R. Sakamoto, S. Sakakibara, A. Sagara, M. Sasao, K. Sato, M. Sato, T. Seki, T. Shimozuma, S. Sudo, H. Suzuki, Y. Takeiri, K. Tanaka, K. Toi, T. Tokuzawa, K. Tsumori, T. Watanabe, K. Yamazaki, I. Yamada, M. Yokoyama, Y. Yoshimura, T. Watari, Y. Xu, O. Kaneko, K. Kawahata, H. Yamada, O. Motojima, N. Ashikawa, T. Kobuchi, Y. Liang, N. Tamura, T. Notake, K. Saito, Y. Torii, S. Yamamoto

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Abstract

In the Large Helical Device plasma discharges, the size of an externally imposed island with mode number ([Formula presented]) decreases substantially when the plasma is collisionless ([Formula presented]) and the beta is finite ([Formula presented]) at the island location. For the collisional plasmas with finite beta, on the other hand, the size of the island increases. However, there is a threshold in terms of the vacuum island size below which the island enlargement is not seen.

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume88
Issue number5
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ohyabu, N., Ida, K., Morisaki, T., Narihara, K., Komori, A., Watanabe, K., ... Yamamoto, S. (2002). Island Dynamics in the Large-Helical-Device Plasmas. Physical Review Letters, 88(5). https://doi.org/10.1103/PhysRevLett.88.055005