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Pedestal conditions for small ELM regimes in tokamaks

N Oyama, P Gohil, L D Horton, A E Hubbard, J W Hughes, Y Kamada, K Kamiya, A W Leonard, A Loarte, R Maingi2006年Plasma Physics and Controlled FusionIF 2.2出版社

Several small/no ELM regimes such as EDA, grassy ELM, HRS, QH-mode, type II and V ELMs with good confinement properties have been obtained in Alcator C-Mod, ASDEX-Upgrade, DIII-D, JET, JFT-2M, JT-60U and NSTX. All these regimes show considerable reduction of instantaneous ELM heat load onto divertor target plates in contrast to conventional type I ELM, and ELM energy losses are evaluated as less than 5% of the pedestal stored energy. These small/no ELM regimes are summarized and widely categorized by their pedestal conditions in terms of the operational space in non-dimensional pedestal parameters and requirement of plasma shape/configuration. The characteristics of edge fluctuations and activities of ideal MHD stability leading to small/no ELMs are also summarized.

日本語訳

いくつかの小さな/無ELM領域(例えば、EDA、grassy ELM、HRS、QHモード、タイプIIおよびV ELM)は、良好な閉じ込め特性を伴って、Alcator C-Mod、ASDEX-Upgrade、DIII-D、JET、JFT-2M、JT-60UおよびNSTXにおいて得られている。これらの全ての領域は、従来のタイプI ELMと対照的に、ダイバータ標的板への瞬間的なELM熱負荷の大幅な低減を示し、ELMエネルギー損失はペデスタル蓄積エネルギーの5%未満と評価されている。これらの小さな/無ELM領域は、非次元ペデスタルパラメータにおける動作領域とプラズマ形状/配位の要件に関して広く分類されている。小さな/無ELMにつながるエッジ揺動の特性と理想MHD安定性の活動もまとめられている。

装置

alcator-c-mod中精度(概要文一致)asdex-upgrade中精度(概要文一致)diii-d中精度(概要文一致)jet中精度(概要文一致)nstx-u中精度(概要文一致)

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Edge localized modePedestal
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