Stationary ELM-free H-mode in ASDEX Upgrade

被引：46
|
作者：
Gil, L. [1 ]
Silva, C. [1 ]
Happel, T. [2 ]
Birkenmeier, G. [2 ,3 ]
Conway, G. D. [2 ]
Guimarais, L. [1 ]
Kallenbach, A. [2 ]
Puetterich, T. [2 ]
Santos, J. [1 ]
Schneider, P. A. [2 ]
Schubert, M. [2 ]
Seliunin, E. [1 ]
Silva, A. [1 ]
Stober, J. [2 ]
Stroth, U. [2 ,3 ]
Trier, E. [2 ]
Wolfrum, E. [2 ]
机构：
[1] Univ Lisbon, Inst Plasmas & Fusao Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal
[2] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany
[3] Tech Univ Munich, Phys Dept E28, D-85748 Garching, Germany
来源：
NUCLEAR FUSION | 2020年 / 60卷 / 05期
关键词：
ELM-free; H-mode; quasi-coherent mode; high confinement; EDA; pedestal; ASDEX upgrade; ALCATOR C-MOD; CONFINEMENT MODES; PEDESTAL;
D O I：
10.1088/1741-4326/ab7d1b
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：
A stationary H-mode without edge localized modes (ELMs) has been recently achieved in the ASDEX Upgrade tokamak by applying central electron cyclotron resonance heating above the L-H power threshold with adequate fueling. It is naturally obtained in favorable del B configuration and has several features which are desirable for future reactors, such as dominant electron heating, low input torque, possibility of access at low input power, good energy confinement (H-98y2 = 0.9-1.3), high density (f(GW) = 0.8-0.9), and no impurity accumulation despite the absence of ELMs. This regime is similar to the EDA H-mode and always features an edge electromagnetic quasi-coherent mode which seems to be responsible for enhanced transport losses, as its appearance and disappearance are correlated with changes in edge and divertor parameters.
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页数：6
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