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Reduced divertor heat loads, plasma shape effects, and radial electric field structures in JFT-2M HRS H-mode plasmas

K. Kamiya, H. Kawashima, T. Ido, N. Oyama, M. Bakhtiari, S. Kasai, Y. Kusama, Y. Miura, H. Ogawa, K. Tsuzuki2006年被引用 3Nuclear FusionIF 3出版社

A key feature of the 'high recycling steady' (HRS) H-mode regimes is the reduction of the transient heat load to the divertor target due to large ELMs. The heat flux to the divertor targets measured by means of a Langmuir probe in the scrape-off layer on the target plate is about ∼0.3 MW m−2 in the typical HRS plasmas, which is very small in comparison with the transient heat load in the ELMy H-mode discharge. In addition, the effects of the plasma shaping on the access to and improved plasma performance of HRS H-mode regimes have been investigated. Furthermore, simultaneous measurements of both density fluctuations and potential profiles at the plasma edge region using a heavy ion beam probe are also presented.

日本語訳

「高リサイクリング定常」(HRS)Hモード領域の重要な特徴は、大きなELMによるダイバータターゲットへの過渡熱負荷が低減されることである。スクレイプオフ層内のターゲット板上でラングミュアプローブにより測定された熱流束は、典型的なHRSプラズマにおいて約0.3 MW m⁻²であり、これはELMy Hモード放電における過渡熱負荷と比較して非常に小さい。さらに、HRS Hモード領域へのアクセスおよびプラズマ性能向上に対するプラズマ形状の影響が調査された。また、重イオンビームプローブを用いたプラズマ周辺領域における密度揺動と電位分布の同時測定結果も提示される。

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DivertorH-modeRadial electric fieldHeat loadJFT-2M
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