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ELM simulation experiments on Pilot-PSI using simultaneous high flux plasma and transient heat/particle source

G. De Temmerman, J.J. Zielinski, S. van Diepen, L. Marot, M. Price2011年被引用 98Nuclear FusionIF 3出版社

A new experimental setup has been developed for edge localized mode (ELM) simulation experiments with relevant steady-state plasma conditions and transient heat/particle source. The setup is based on the Pilot-PSI linear plasma device and allows the superimposition of a transient heat/particle pulse to the steady-state heat flux plasma. Energy densities as high as 1 MJ m−2 have been reached for a pulse duration of about 1.5 ms, and for a variety of gases (H, He, Ar). In this contribution, we report on the first experiments investigating the effect of the combined steady-state/pulsed plasma on polycrystalline tungsten targets. Under such conditions the threshold for tungsten release and surface roughening is found to be much lower than in previously reported experiments. This suggests that the combination of the high flux plasma and transient heat/particle source leads to strong synergistic effects.

日本語訳

エッジ局在モード(ELM)模擬実験のための新しい実験装置が、定常状態のプラズマ条件と過渡的な熱・粒子源を備えて開発された。この装置はPilot-PSI線形プラズマ装置に基づいており、定常熱流プラズマに過渡的な熱・粒子パルスを重畳することを可能にする。エネルギー密度は、約1.5 msのパルス持続時間において、様々なガス(H、He、Ar)に対して最大1 MJ m⁻²に達している。本稿では、多結晶タングステンターゲットに対する定常・パルス複合プラズマの影響を調べた最初の実験について報告する。このような条件下では、タングステンの放出閾値と表面粗面化の閾値が、これまでに報告された実験よりもはるかに低いことが見出された。これは、高フラックスプラズマと過渡的な熱・粒子源の組み合わせが、強い相乗効果をもたらすことを示唆している。

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