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Investigation of inter-ELM ion heat transport in the H-mode pedestal of ASDEX Upgrade plasmas

E. Viezzer, E. Fable, M. Cavedon, C. Angioni, R. Dux, F.M. Laggner, M. Bernert, A. Burckhart, R.M. McDermott, T. Pütterich2017年被引用 25Nuclear FusionIF 3出版社

The ion heat transport in the pedestal of H-mode plasmas is investigated in various H-mode discharges with different pedestal ion collisionalities. Interpretive modelling suggests that in all analyzed discharges the ion heat diffusivity coefficient, , in the pedestal is close to the neoclassical prediction within the experimental uncertainties. The impact of changing the deposition location of the electron cyclotron resonance heating on the ion heat transport has been studied. The effect on the background profiles is small. The pre-ELM (edge localized modes) edge profiles as well as the behaviour of the electron temperature and density, ion temperature and impurity toroidal rotation during the ELM cycle are very similar in discharges with on- and off-axis ECRH heating. No significant deviation of from neoclassics is observed when changing the ECRH deposition location to the plasma edge.

日本語訳

Hモードプラズマのペデスタルにおけるイオン熱輸送を、異なるペデスタルイオン衝突度を持つ様々なHモード放電において調査した。解釈的モデリングは、解析された全ての放電において、ペデスタル内のイオン熱拡散係数が実験的不確かさの範囲内で新古典論的予測に近いことを示唆している。電子サイクロトロン共鳴加熱の堆積位置を変更することのイオン熱輸送への影響が研究された。背景プロファイルへの影響は小さい。ELM前(周辺局在モード)の周辺プロファイル、ならびにELMサイクル中の電子温度・密度、イオン温度、不純物トロイダル回転の挙動は、オン軸およびオフ軸ECRH加熱の放電において非常に類似している。ECRHの堆積位置をプラズマ端に変更した場合、新古典論からの有意な偏差は観測されない。

装置

asdex-upgrade高精度(タイトル一致)

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ASDEXEdge localized modeASDEX UpgradeH-modePedestalHeat transportH-mode pedestal
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