测地声模的性质及其与密度涨落的关系。
Properties of geodesic acoustic modes and the relation to density fluctuations.
作者信息
Krämer-Flecken A, Soldatov S, Koslowski H R, Zimmermann O
机构信息
Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, D-52425 Jülich, Germany.
出版信息
Phys Rev Lett. 2006 Jul 28;97(4):045006. doi: 10.1103/PhysRevLett.97.045006.
The geodesic acoustic mode (GAM) is a high frequency branch of zonal flows, which is observed in toroidal plasmas. Because of toroidal curvature effects, density fluctuations are excited, which are investigated with the O-mode correlation reflectometer at TEXTOR. This Letter reports on the poloidal distribution of GAM induced density fluctuation and compares them with theoretical predictions. The influence of the GAM flows on the ambient turbulence is studied, too.
测地声模（GAM）是带状流的高频分支，在环形等离子体中被观测到。由于环形曲率效应，激发了密度涨落，利用TEXTOR装置上的O模相关反射仪对其进行了研究。本信函报道了GAM诱导的密度涨落的极向分布，并将其与理论预测进行了比较。还研究了GAM流对周围湍流的影响。
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