Observation of pedestal turbulence in edge localized mode-free H-mode on experimental advanced superconducting tokamak

被引：14
|
作者：
Han, X. [1 ]
Zhang, T. [1 ]
Zhang, S. B. [1 ]
Wang, Y. M. [1 ]
Shi, T. H. [1 ]
Liu, Z. X. [1 ]
Kong, D. F. [1 ]
Qu, H. [1 ]
Gao, X. [1 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
来源：
PHYSICS OF PLASMAS | 2014年 / 21卷 / 10期
基金：
中国国家自然科学基金;
关键词：
ALCATOR C-MOD; CONFINEMENT; REGIMES; ENERGY;
D O I：
10.1063/1.4897923
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：
Two different pedestal turbulence structures have been observed in edge localized mode-free phase of H-mode heated by lower hybrid wave and RF wave in ion cyclotron range of frequencies (ICRF) on experimental advanced superconducting tokamak. When the fraction of ICRF power P-ICRF/P-total exceeds 0.7, coherent mode is observed. The mode is identified as an electromagnetic mode, rotating in electron diamagnetic direction with a frequency around 50 kHz and toroidal mode number n = -3. Whereas when P-ICRF/P-total is less than 0.7, harmonic mode with frequency f = 40-300 kHz appears instead. The characteristics of these two modes are demonstrated preliminarily. The threshold value of heating power and also the plasma parameters are distinct. (C) 2014 AIP Publishing LLC.
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页数：7
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