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ELM-induced cold pulse propagation in ASDEX Upgrade

E Trier, E Wolfrum, M Willensdorfer, Q Yu, M Hoelzl, F Orain, F Ryter, C Angioni, M Bernert, M G Dunne2019年Plasma Physics and Controlled FusionIF 2.2出版社

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the plasma current are the main determining parameters for the inward penetration of the Te perturbations. With increasing plasma current the ELM penetration is more shallow in spite of the stronger ELMs. Estimates of the heat pulse diffusivity show that the corresponding transport is too large to be representative of the inter-ELM phase. Ergodization of the plasma edge during ELMs is a possible explanation for the observed properties of the cold pulse propagation, which is qualitatively consistent with non-linear magneto-hydro-dynamic simulations.

日本語訳

ASDEX Upgradeにおいて、タイプIエッジ局在モード(ELM)によって誘起される冷パルスの伝播を、中程度の三角形度を有するプラズマのデータセットを用いて、電子サイクロトロン放射測定により研究した。エッジ安全係数またはプラズマ電流が、Te摂動の内側への浸透深さを決定する主要なパラメータであることが見出された。プラズマ電流の増加に伴い、ELMがより強くなるにもかかわらず、ELMの浸透はより浅くなる。熱パルス拡散率の評価は、対応する輸送がELM間期の輸送を代表するには大きすぎることを示している。ELM中のプラズマエッジのエルゴ化は、冷パルス伝播の観測された特性に対する有力な説明であり、これは非線形磁気流体力学シミュレーションと定性的に一致する。

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asdex-upgrade高精度(タイトル一致)

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ASDEXEdge localized modeASDEX Upgrade
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