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Sawtooth oscillation in current-carrying plasma in the large helical device.
Nagayama, Y; Kawahata, K; Inagaki, S; Peterson, B J; Sakakibara, S; Tanaka, K; Tokuzawa, T; Watanabe, K Y; Ashikawa, N; Chikaraishi, H; Emoto, M; Funaba, H; Goto, M; Hamada, Y; Ichiguchi, K; Ida, K; Idei, H; Ido, T; Ikeda, K; Imagawa, S; Isayama, A; Isobe, M; Iwamoto, A; Kaneko, O; Kitagawa, S; Komori, A; Kubo, S; Kumazawa, R; Masuzaki, S; Matsuoka, K; Mito, T; Miyazawa, J; Morisaki, T; Morita, S; Motojima, O; Murakami, S; Mutoh, T; Muto, S; Nakajima, N; Nakamura, Y; Nakanishi, H; Narihara, K; Narushima, Y; Nishimura, A; Nishimura, K; Nishizawa, A; Noda, N; Ohdachi, S; Ohkubo, K; Ohyabu, N.
Afiliação
  • Nagayama Y; National Institute for Fusion Science, Toki 509-5292, Japan.
Phys Rev Lett ; 90(20): 205001, 2003 May 23.
Article em En | MEDLINE | ID: mdl-12785901
ABSTRACT
Sawtooth oscillations have been observed in current-carrying helical plasmas by using electron-cyclotron-emission diagnostics in the Large Helical Device. The plasma current, which is driven by neutral beam injection, reduces the beta threshold of the sawtooth oscillation. When the central q value is increased due to the plasma current, the core region crashes, and, when it is decreased, the edge region crashes annularly. Observed rapid mixture of the plasma in the limited region suggests that these sawtooth crashes are reconnection phenomena. Unlike previous experiments, no precursor oscillation has been observed.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2003 Tipo de documento: Article País de afiliação: Japão
Buscar no Google
Adicionar na Minha BVS
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2003 Tipo de documento: Article País de afiliação: Japão