Coupling between the Alfvén eigenmode and edge-coherent mode on the experimental advanced superconducting tokamak

被引：0

作者：

Wang, M. Y. ^{[1
,2
]}

Liu, A. D. ^{[2
]}

Zhou, C. ^{[2
]}

Zhuang, G. ^{[2
]}

Feng, X. ^{[2
]}

Zhang, J. ^{[2
]}

Zhong, X. M. ^{[2
]}

Zhang, R. B. ^{[1
]}

Wang, Y. H. ^{[1
]}

Yang, J. X. ^{[1
]}

Li, H. ^{[2
]}

Lan, T. ^{[2
]}

Xie, J. L. ^{[2
]}

Liu, H. Q. ^{[3
]}

Liu, Z. X. ^{[2
]}

Mao, W. Z. ^{[2
]}

Ding, W. X. ^{[2
]}

Liu, W. D. ^{[2
]}

机构：

[1] Anqing Normal Univ, Sch Math & Phys, Anqing 246133, Peoples R China

[2] Univ Sci & Technol China, Dept Plasma Phys & Fus Engn, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2024年 / 66卷 / 05期

关键词：

Doppler reflectometer; nonlinear interactions; Alfven eigenmode; TOROIDAL ALFVEN EIGENMODES; WAVE; DRIVEN; EXCITATION; STABILITY;

D O I：

10.1088/1361-6587/ad30c1

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

High-frequency electromagnetic fluctuations and edge-coherent modes (ECMs) have been detected by Doppler reflectometry (DR) in the pedestal region of the Experimental Advanced Superconducting Tokamak. The frequency of the electromagnetic fluctuations was proportional to the Alfven velocity and localized in the ellipticity-induced Alfven eigenmodes (EAEs) gap in the Alfven continuum. Therefore, the fluctuations are presumed to be EAE. The DR measurements of poloidal flow fluctuations show that EAEs and ECMs have amplitude envelopes that are localized near the bottom of the radial electric field well. Simultaneous EAE and ECM activity generates sidebands at fEAE +/- fECM , the strengths of the upper and lower sidebands are unequal, with the upper sideband being stronger. This is consistent with the theoretical prediction of Chen et al. Compared with ECM-only discharges, the inclusion of EAEs leads to an increase in D alpha intensity, thus indicating enhanced outward particle transport.

引用

页数：7

共 66 条

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