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Structure, stability and ELM dynamics of the H-mode pedestal in DIII-D

M.E. Fenstermacher, T.H. Osborne, A.W. Leonard, P.B. Snyder, D.M. Thomas, J.A. Boedo, T.A. Casper, R.J. Groebner, M. Groth, M.A.H. Kempenaars2005年被引用 49Nuclear FusionIF 3出版社

Experiments are described that have increased our understanding of the transport and stability physics that set the H-mode edge pedestal width and height, determine the onset of Type-I edge localized modes (ELMs) and produce the nonlinear dynamics of the ELM perturbation in the pedestal and scrape-off layer (SOL). Models now exist for the ne pedestal profile and the pe height at the onset of Type-I ELMs, and progress has been made towards models of the Te pedestal width and nonlinear ELM evolution. Similarity experiments between DIII-D and JET suggested that neutral penetration physics plays an important role in the relationship between the width and height of the ne pedestal. Plasma physics appears to dominate in setting the Te pedestal width. Measured pedestal conditions including edge current at ELM onset agree with intermediate-n peeling–ballooning (P–B) stability predictions. Midplane ELM dynamics data show the predicted (P–B) structure at the ELM onset, large rapid variations of the SOL parameters and fast radial propagation in later phases, similar to features in nonlinear ELM simulations.

日本語訳

Hモードのエッジペデスタル幅と高さを決定し、Type-Iエッジ局在モード(ELM)の発生を決定づけ、ペデスタルおよびスクレイプオフ層(SOL)におけるELM摂動の非線形ダイナミクスを生み出す輸送および安定性物理の理解を深めた実験について述べる。現在では、neペデスタルプロファイルとType-I ELM発生時のpe高さに関するモデルが存在し、Teペデスタル幅と非線形ELM発展のモデルに向けた進展も見られている。DIII-DとJET間の相似実験は、neペデスタルの幅と高さの関係において中性粒子侵入物理が重要な役割を果たすことを示唆した。ELM発生時のエッジ電流を含む測定されたペデスタル条件は、中間nピーリング・バルーニング(P–B)安定性予測と一致する。ペデスタル中間面のELMダイナミクスデータは、ELM発生時に予測された(P–B)構造、SOLパラメータの大きな急速変動、および後期段階での高速径方向伝播を示しており、これは非線形ELMシミュレーションの特徴と類似している。

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diii-d高精度(タイトル一致)jet低精度(概要文一致)

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DIII-DEdge localized modeH-modePedestalH-mode pedestal
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