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Non-linear MHD simulations of ELMs in JET and quantitative comparisons to experiments

S Pamela, T Eich, L Frassinetti, B Sieglin, S Saarelma, G Huijsmans, M Hoelzl, M Becoulet, F Orain, S Devaux2016年Plasma Physics and Controlled FusionIF 2.2出版社

A subset of JET ITER-like wall (ILW) discharges, combining electron density and temperature as well as divertor heat flux measurements, has been collected for the validation of non-linear magnetohydrodynamic (MHD) simulations of edge-localised-modes (ELMs). This permits a quantitative comparison of simulation results against experiments, which is required for the validation of predicted ELM energy losses and divertor heat fluxes in future tokamaks like ITER. This paper presents the first results of such a quantitative comparison, and gives a perspective of what will be necessary to achieve full validation of non-linear codes like JOREK. In particular, the present study highlights the importance of pre-ELM equilibria and parallel energy transport models in MHD simulations, which form the underlying basis of ELM physics.

日本語訳

JETのITER類似壁(ILW)放電のサブセットにおいて、電子密度と電子温度、ならびにダイバータ熱流束の測定値を組み合わせたデータが、エッジ局在モード(ELM)の非線形磁気流体力学(MHD)シミュレーションの検証のために収集された。これにより、シミュレーション結果と実験の定量的比較が可能となり、ITERのような将来のトカマクにおけるELMエネルギー損失とダイバータ熱流束の予測検証に必要とされる。本論文は、このような定量的比較の最初の結果を示し、JOREKのようなコードの完全な検証を達成するために必要な事項についての見通しを提供する。特に、本研究は、ELM物理の基礎を形成するMHDシミュレーションにおけるELM前平衡状態と平行エネルギー輸送モデルの重要性を強調するものである。

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jet高精度(タイトル一致)iter低精度(概要文一致)

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JETMagnetohydrodynamicsEdge localized mode
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