Impact of Energetic-Particle-Driven Geodesic Acoustic Modes on Turbulence

被引：83
|
作者：
Zarzoso, D. [1 ]
Sarazin, Y. [1 ]
Garbet, X. [1 ]
Dumont, R. [1 ]
Strugarek, A. [1 ,2 ]
Abiteboul, J. [1 ]
Cartier-Michaud, T. [1 ]
Dif-Pradalier, G. [1 ]
Ghendrih, Ph [1 ]
Grandgirard, V. [1 ]
Latu, G. [1 ]
Passeron, C. [1 ]
Thomine, O. [1 ]
机构：
[1] CEA, IRFM, F-13108 St Paul Les Durance, France
[2] Univ Paris Diderot, CNRS, INSU, Lab AIM Paris Saclay,Irfu,CEA, F-91191 Gif Sur Yvette, France
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 12期
关键词：
ZONAL FLOWS;
D O I：
10.1103/PhysRevLett.110.125002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The impact on turbulent transport of geodesic acoustic modes excited by energetic particles is evidenced for the first time in flux-driven 5D gyrokinetic simulations using the GYSELA code. Energetic geodesic acoustic modes (EGAMs) are excited in a regime with a transport barrier in the outer radial region. The interaction between EGAMs and turbulence is such that turbulent transport can be enhanced in the presence of EGAMs, with the subsequent destruction of the transport barrier. This scenario could be particularly critical in those plasmas, such as burning plasmas, exhibiting a rich population of suprathermal particles capable of exciting energetic modes. DOI: 10.1103/PhysRevLett.110.125002
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收藏
页数：5
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