Geodesic acoustic mode investigation in the spherical Globus-M tokamak using multi-diagnostic approach

被引：29

作者：

Bulanin, V. V. ^{[1
]}

Gusev, V. K. ^{[2
]}

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

Khromov, N. A. ^{[2
]}

Kurskiev, G. S. ^{[2
]}

Minaev, V. B. ^{[2
]}

Patrov, M. I. ^{[2
]}

Petrov, A. V. ^{[1
]}

Petrov, Yu. V. ^{[2
]}

Sakharov, N. V. ^{[2
]}

Shchegolev, P. B. ^{[2
]}

Tolstyakov, S. Yu. ^{[2
]}

Varfolomeev, V. I. ^{[2
]}

Wagner, F. ^{[3
]}

Yashin, Yu. ^{[1
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, St Petersburg, Russia

[2] RAS, Ioffe Inst, St Petersburg, Russia

[3] Max Planck Inst Plasma Phys, Greifswald, Germany

来源：

NUCLEAR FUSION | 2016年 / 56卷 / 01期

关键词：

geodesic acoustic mode; multi-diagnostic approach; spherical tokamak; zonal flow; doppler reflectometry; limit cycle oscillations; ZONAL FLOWS; DOPPLER REFLECTOMETRY; BISPECTRAL ANALYSIS; PLASMA; OSCILLATIONS; FLUCTUATION; TRANSITIONS; RANGE;

D O I：

10.1088/0029-5515/56/1/016017

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 results of a multi-diagnostic approach for geodesic acoustic mode (GAM) studies in the spherical torus Globus-M are presented. The GAM oscillations of radial electric field, plasma density and magnetic field were simultaneously observed. The spatial structures of crucial plasma parameters are exhibited and discussed. The intermittent character of the GAM manifests itself as a modulation at two time-scales: equilibrium time scale and the characteristic time for limit-cycle oscillations. The mutual influence of GAM oscillations and turbulence is demonstrated by bicoherence analysis.

引用

页数：8

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