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Observation of internal transport barrier in ELMy H-mode plasmas on the EAST tokamak

Y Yang, X Gao, H Q Liu, G Q Li, T Zhang, L Zeng, Y K Liu, M Q Wu, D F Kong, T F Ming2017年Plasma Physics and Controlled FusionIF 2.2出版社

The internal transport barrier (ITB) has been obtained in ELMy H-mode plasmas by neutron beam injection and lower hybrid wave heating on the Experimental Advanced Superconducting Tokamak (EAST). The ITB structure has been observed in profiles of ion temperature, electron temperature, and electron density within ρ < 0.5. It was also observed that the ITB formation is stepwise. Due to the ITB formation, the confinement quality H98y2 increases from 1 to 1.1 and the normalized beta, βN, increases from 1.5 to near 2. The fishbone activity observed during the ITB phase suggests the central safety factor q(0) ∼ 1. Transport coefficients are calculated by particle balance and power balance analysis, showing an obvious reduction after the ITB formation.

日本語訳

内部輸送障壁(ITB)は、実験先進超伝導トカマク(EAST)における中性粒子ビーム入射と低混合同軸波加熱により、ELMy Hモードプラズマ中で得られた。ITB構造は、ρ < 0.5 の範囲におけるイオン温度、電子温度、および電子密度の分布で観測された。また、ITB形成が段階的であることも観測された。ITB形成により、閉じ込め品質 H98y2 は 1 から 1.1 へ増加し、規格化ベータ βN は 1.5 から約 2 へ増加した。ITB位相中に観測されたフィッシュボーン活動は、中心安全係数 q(0) ∼ 1 を示唆している。輸送係数は粒子バランスおよびパワーバランス解析により計算され、ITB形成後に明確な低減を示した。

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east高精度(タイトル一致)

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EASTEdge localized modeH-modeTransport barrierInternal transport barrierELMy H-mode
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