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The unified effect of counter-toroidal rotation and power across separatrix on type-I ELMs in JT-60U

H. Urano, N. Oyama, K. Kamiya, N. Aiba, Y. Kamada, T. Fujita, the JT-60 Team2012年被引用 2Nuclear FusionIF 3出版社

By conducting power scan experiments using perpendicular neutral beams (NBs) after the injection of tangential NBs in directions co-, balanced and counter to the plasma current, the unified effect of counter-toroidal rotation and heating power on type-I edge-localized modes (ELMs) was investigated in a JT-60U tokamak. ELM frequency fELM increased monotonically together with the power across the separatrix Psep for all the cases of tangential NBs. However, dependence of fELM on Psep was explicitly stronger than a simple proportionality when perpendicular NBs were injected. The toroidal rotation velocity at the H-mode pedestal shifted continuously in the counter-direction when perpendicular NBs were applied. At fixed values of , fELM increased clearly in proportion to Psep. In addition, this proportionality between fELM and Psep holds regardless of the mixture of datasets of the toroidal momentum inputs. The proportional coefficient decreased as shifted in the co-direction.

日本語訳

接線方向中性粒子ビーム(NB)をプラズマ電流と同方向、平衡方向、および逆方向に入射した後、垂直方向中性粒子ビームを用いてパワースキャン実験を実施することにより、JT-60Uトカマクにおいて、タイプI周辺局在モード(ELM)に対する反トロイダル回転と加熱パワーの統合効果を調べた。全ての接線方向NBの入射条件において、ELM周波数fELMはセパラトリックスを横切るパワーPsepとともに単調に増加した。しかしながら、垂直方向NB入射時には、fELMのPsepへの依存性は単純な比例関係よりも明確に強かった。Hモードペデスタルにおけるトロイダル回転速度は、垂直方向NB印加時に反トロイダル方向へ連続的にシフトした。固定されたPsepの値において、fELMはPsepに比例して明確に増加した。さらに、fELMとPsepの間のこの比例関係は、トロイダル運動量入力の混合比に関係なく成立した。比例係数は、が同方向へシフトするにつれて減少した。

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Edge localized modeJT-60UToroidal rotation
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