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Observation of internal transport barrier evolution in ELMy H-mode plasma in the EAST

L Yu, G S Li, M Q Wu, Z Zhou, T Zhang, X H Wu, K N Geng, G Q Li, K X Ye, J Huang2024年11月Plasma Physics and Controlled FusionIF 2.2出版社

Research shows that there is an asynchronous evolution process between the internal transport barriers (ITBs) formed in three channels (ion temperature, electron temperature, and density). Under the condition of a low toroidal magnetic field ( ∼ 1.6 T), the electron density ITB is the easiest to implement through the fueling effect of the first neutral beam injection with the least heating power. However, the ITB appears to be independent of heating power. The ion temperature ITB can be formed without reaching the threshold power under the condition of strong E × B shear flow, while maintaining ITBs in ion and electron channels simultaneously requires higher heating power. Moreover, the foot of the ITB formed in the strong E × B shear case is located outside that in the fishbone case, while the ITB strength remains almost unchanged. The fishbone activities do not always occur prior to ITB formation, as our previous results have shown, suggesting that there may be no direct relationship between the physical process of ITB triggering and fishbone activities.

日本語訳

研究により、イオン温度、電子温度、密度の3つのチャンネルに形成される内部輸送障壁(ITB)の間には、非同期の進展過程が存在することが示されている。低トロイダル磁場(∼1.6 T)の条件下では、電子密度ITBは、最初の中性粒子ビーム入射の燃料供給効果を通じて、最小の加熱電力で最も実現しやすい。しかしながら、そのITBは加熱電力に依存しないように見える。イオン温度ITBは、強いE×Bせん断流の条件下では閾値電力に達することなく形成され得る一方で、イオンおよび電子チャンネルにおいてITBを同時に維持するには、より高い加熱電力が必要である。さらに、強いE×Bせん断の場合に形成されるITBのフットは、フィッシュボーン活動の場合のそれの外側に位置するが、ITB強度はほぼ変化しない。我々の以前の結果が示すように、フィッシュボーン活動は必ずしもITB形成に先行して発生するわけではなく、ITBのトリガリングの物理過程とフィッシュボーン活動との間には直接的な関係がない可能性があることが示唆される。

装置

east高精度(タイトル一致)

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EASTEdge localized modeH-modeTransport barrierInternal transport barrierELMy H-mode

AIによる論文要約

東アジア実験炉(EAST)におけるELMy H-モード プラズマの内部輸送障壁の進化の観測
JA本論文は、プラズマの閉じ込め特性を理解し、核融合炉の設計に役立つ研究であり、プラズマ物理や核融合工学の研究者に有益です。#PlasmaPhysics #FusionEnergy #EnergyResearch #EAST #InternalTransportBarrier
LLM向け: {'Title': 'Observation of internal transport barrier evolution in ELMy H-mode pl…

本研究では、イオン温度、電子温度、密度の3つのチャンネルで形成される内部輸送障壁(ITB)の非同期な進化過程が明らかになりました。低磁場条件下では、最小の加熱パワーで電子密度ITBが最も実現しやすいことがわかりました。一方、イオン温度ITBは強いE×B shear flowがあれば加熱パワーしきい値なしに形成できます。同時にイオンおよび電子チャンネルでのITB維持には高い加熱パワーが必要です。

Observation of internal transport barrier evolution in ELMy H-mode plasma in the EAST
ENThis paper would be of interest to fusion researchers studying plasma confinement and transport, as well as students in the field of plasma physics and fusion energy.#FusionPlasma #InternalTransportBarrier #PlasmaConfinement #ELMy-H-mode #EAST
LLM向け: {'Title': 'Observation of internal transport barrier evolution in ELMy H-mode pl…

This paper investigates the asynchronous evolution of internal transport barriers (ITBs) in different plasma channels (ion temperature, electron temperature, and density) under low toroidal magnetic field conditions. It shows that the electron density ITB is the easiest to achieve, while the ion temperature ITB can form without reaching the power threshold due to strong E×B shear flow. Maintaining ITBs in multiple channels requires higher heating power.

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