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Characterization of geodesic acoustic modes in the ISTTOK edge plasma

C Silva, P Duarte, H Fernandes, H Figueiredo, I Nedzelskij, C Hidalgo, M A Pedrosa2009年Plasma Physics and Controlled FusionIF 2.2出版社

ISTTOK is equipped with two probe systems that allow the simultaneous measurement of the three-dimensional characteristics of the edge fluctuations with high temporal resolution. Electrostatic fluctuations consistent with the geodesic acoustic mode (GAM) are observed in the edge plasma. The radial, poloidal and toroidal structure of the fluctuations are investigated and good agreement with the GAM theoretical predictions is found. Furthermore, experimental evidence is presented suggesting that the GAM is modulating long-range correlations and the ambient turbulent fluctuations.

日本語訳

ISTTOKには、高時間分解能で周辺揺らぎの三次元特性を同時測定できる2つのプローブシステムが装備されている。周辺プラズマにおいて、測地音響モード(GAM)と一致する静電揺らぎが観測される。この揺らぎのポロイダル方向、ラジアル方向、トロイダル方向の構造が調査され、GAMの理論的予測と良好な一致が見られる。さらに、GAMが長距離相関および周辺乱流揺らぎを変調していることを示す実験的証拠が提示される。

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Edge plasmaAcoustic modeGeodesic acoustic modeISTTOK
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