Nonlocal analysis of the excitation of the geodesic acoustic mode by drift waves

被引：14

作者：

Guzdar, P. N. ^{[1
]}

Kleva, R. G. ^{[1
]}

Chakrabarti, N. ^{[2
]}

Naulin, V. ^{[3
]}

Rasmussen, J. J. ^{[3
]}

Kaw, P. K. ^{[4
]}

Singh, R. ^{[4
]}

机构：

[1] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

[2] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India

[3] Tech Univ Denmark, Assoc EURATOM Riso DTU, Riso Natl Lab Sustainable Energy, DK-4000 Roskilde, Denmark

[4] Inst Plasma Res, Bhat 384424, Ghandhinagar, India

来源：

PHYSICS OF PLASMAS | 2009年 / 16卷 / 05期

关键词：

plasma boundary layers; plasma drift waves; plasma toroidal confinement; Tokamak devices; ZONAL FLOWS; ALFVEN TURBULENCE; TOROIDAL PLASMAS; TOKAMAK; OSCILLATIONS; COHERENT;

D O I：

10.1063/1.3143125

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：

The geodesic acoustic modes (GAMs) are typically observed in the edge region of toroidal plasmas. Drift waves have been identified as a possible cause of excitation of GAMs by a resonant three wave parametric process. A nonlocal theory of excitation of these modes in inhomogeneous plasmas typical of the edge region of tokamaks is presented in this paper. The continuum GAM modes with coupling to the drift waves can create discrete "global" unstable eigenmodes localized in the edge "pedestal" region of the plasma. Multiple resonantly driven unstable radial eigenmodes can coexist on the edge pedestal.

引用

页数：7

共 22 条

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