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Comparison of theory-based and semi-empiricaltransport modelling in JET plasmas with ITBs

T J J Tala, V V Parail, A Becoulet, G Corrigan, D J Heading, M J Mantsinen, P I Strand, contributors to the EFDA-JET Workprogramme2002年Plasma Physics and Controlled FusionIF 2.2出版社

The theory-based Weiland transport model has been applied to JETdischarges with internal transport barriers (ITBs) for the first time. Theagreement of the modelling results with the experiments has been foundto be comparable with the agreement of the modelling results producedby the semi-empirical Bohm/gyro-Bohm transport model. Weiland modeloverestimates the width of the ITB and the electron temperature. Thereis evidence that the density gradient in the Weiland modelplays a more important role in governing the ITB formation dynamics forJET discharges than the suppression of turbulence by theωE×B flow shearing rate.

日本語訳

理論ベースのWeiland輸送モデルが、内部輸送障壁(ITB)を有するJET放電に初めて適用された。モデリング結果と実験との一致は、半経験的Bohm/ジャイロBohm輸送モデルによって得られた結果との一致に匹敵することが見出された。Weilandモデルは、ITBの幅と電子温度を過大評価する。密度勾配が、ωE×Bフローシアリング速度による乱流抑制よりも、JET放電におけるITB形成ダイナミクスの支配においてより重要な役割を果たすという証拠がある。

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