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Edge turbulence characteristics and transport during the ELM mitigation with n = 1 resonant magnetic perturbation on EAST

S.C. Liu, N. Yan, Y. Liang, H. Zhang, J.C. Xu, G.S. Xu, L. Wang, R. Chen, G.H. Hu, Y. Ye2020年被引用 6Nuclear FusionIF 3出版社

The edge localized mode (ELM) has been mitigated by n = 1 resonant magnetic perturbation (RMP) in EAST tokamak. The turbulence characteristics and transport during the ELM mitigation have been measured by a series of diagnostics. The edge coherent mode (ECM) with a frequency about 25 kHz almost disappears when ELM is mitigated. The scrape-off layer (SOL) radial turbulent transport is measured by a four-tip Langmuir probe mounted on the manipulator at the outer midplane, exhibiting a strong enhancement of outward particle during the ELM mitigation in the SOL region (3–25 mm outside the LCFS). This enhanced outward radial transport is mainly driven by the low frequency turbulence (< 50 kHz), and is compared with the particle flux deposited on divertor targets quantitatively, revealing a good agreement with each other. It is suggested that a new channel for particle exhaust induced by the low frequency turbulence is beneficial to maintain the ELM mitigation by RMP.

日本語訳

ELMは、EASTトカマクにおいてn=1共鳴磁場摂動(RMP)により緩和された。ELM緩和期間中の乱流特性と輸送は、一連の診断装置によって測定された。周波数約50 kHzの端部コヒーレントモード(ECM)は、ELMが緩和されるとほぼ消失する。スクレイプオフ層(SOL)における径方向乱流輸送は、外側中平面のマニピュレータに取り付けられた4探針ラングミュアプローブによって測定され、ELM緩和期間中、SOL領域(LCFSから3〜25 mm外側)において外向き粒子の顕著な増強が示された。この増強された径方向外向き輸送は、主に低周波数乱流(50 kHz未満)によって駆動され、ダイバータに堆積する粒子フラックスと定量的に比較され、両者の良好な一致が明らかになった。低周波数乱流によって誘起される粒子排気の新たなチャネルが、RMPによるELM緩和の維持に有益であることが示唆された。

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east高精度(タイトル一致)

wiki

EASTEdge localized modeMagnetic perturbationResonant magnetic perturbationEdge turbulence
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