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Author(s):
K.Narihara, I.Yamada, N.Ohyabu, K.Y.Watanabe, N.Ashikawa, P.C.deVries, M. Emoto, H.Funaba, M.Goto, K.Ichiguchi, K.Ida, H.Idei, K.Ikeda, S.Inagaki, N.Inoue, K.Isobe, S.Kado, O.Kanako, K.Kawahata, K. Khlopenkov, T.Kobuchi, A.Komori, S.Kubo, R.Kumazawa, Y.Liang, T.Masuzaki, T.Minami, J.Miyazawa, T.Morisaki, S.Morita, S.Murakami, S.Muto, T.Mutoh, Y.Nagayama, Y.Nakamura, H.Nakanishi, Y.Narushima, K.Nishimura, N.Noda, T.Notake, S.Ohdachi, Y.Oka, M.Osakabe, S.Ozaki, R.O.Pavlichenko, B.J.Peterson, A.Sagara, K.Saito, S.Sakakibara, R.Sakamoto, H.Sasao, M.Sasao, K.Sato, M.Sato, T.Seki, T.Shimozuma, C.Shoji, H.Suzuki, A.Takayama, M.Takechi, Y.Takeiri, N.Tamura, K.Tanaka, K.Toi, N.Tokuzawa, Y.Torii, K.Tsumori, T.Watari, H.Yamada, S.Yamaguchi, S.Yamamoto, M.Yokoyama, Y.Yoshimura, S.Satow, K.Itoh, K.Ohkubo, K.Yamazaki, S.Sudo, O.Motojima, Y.Hamada, M.Fujiwara
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Title:
Shape and Evolution of the Electron Temperature Profile in LHD
Date of publication:
Sep. 2000
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Key words:
IAEA, fusion energy conference, Sorrento
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Abstract:
With a multi-point (200) repetitive (50-200 Hz) Thomson scattering system, we studied the shape and evolution of the electron temperature (T_e) Profiles of the plasma confined in LHD. We first survey various shapes of the observed T_e Profiles and then describe two notable findings in some detail: (1) A pedestal often appeared on T_e Profiles around the iota/2pi =1 surface, but its correlation with confinement was weak; (2) A magnetic island generated by an external error field changed its size in plasma. Normally the island shrank in plasma, but grew upon a hydrogen pellet injection.
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