title: Observation of toroidal flow antiparallel to the <E(r) x B(straight theta)> drift direction in the hot electron mode plasmas in the compact helical system.
abstract: A toroidal flow antiparallel to the <E(r) x B(straight theta)> drift direction is observed in the hot electron mode plasmas when a large positive electric field and a sharp electron temperature gradient are sustained inside the internal transport barrier in the Compact Helical System. This toroidal flow reaches up to 5x10(4) m/s at the plasma center, and it is large enough to reverse the toroidal flow driven by a tangentially injected neutral beam. These observations clearly show the plasma favors flow in the minimum nablaB direction at the transport barrier.
authors: National Institute for Fusion Science, Toki 509-5292, Japan.
authors: K
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authors: Ida
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authors: Minami
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authors: Yoshimura
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authors: Fujisawa
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authors: Suzuki
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authors: Okamura
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authors: Nishimura
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authors: Isobe
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authors: Iguchi
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authors: Itoh
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authors: Kado
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authors: Liang
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authors: Nomura
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authors: Osakabe
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authors: Takahashi
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authors: Tanaka
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authors: Matsuoka