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Analysis of the E × B flow shearing rate in JET ITB discharges

F. Crisanti, B. Esposito, C. Gormezano, A. Tuccillo, L. Bertalot, C. Giroud, C.W. Gowers, R. Prentice, K.-D. Zastrow, M. Zerbini2001年被引用 19Nuclear FusionIF 3出版社

The role of turbulence stabilization by sheared E × B flow isanalysed for different types of internal transport barrier (ITB) in JET discharges.After the ITB formation, the shearing rate ωs is found to consistently exceed arather crude estimate for the ion temperature gradient driven turbulence. The roles playedby toroidal plasma rotation and by density and temperature gradients in both the radialelectric field Er and the shearing rate ωs are evaluated. It turns out that themajor contribution in triggering the positive feedback leading to ITB onset is given bythe toroidal rotation.

日本語訳

JET放電における異なるタイプの内部輸送障壁(ITB)について、せん断されたE×Bフローによる乱流の安定化の役割を解析した。ITB形成後、せん断率ω_sは、イオン温度勾配駆動乱流に対する粗い推定値を一貫して上回ることが見出された。トロイダルプラズマ回転と密度・温度勾配の両方が、径方向電場E_rとせん断率ω_sに果たす役割を評価した。その結果、ITB開始をもたらす正のフィードバックにおける主要な寄与は、トロイダル回転によるものであることが明らかになった。

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jet高精度(タイトル一致)

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JETInternal transport barrierFlow shear
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