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Observation of geodesic acoustic modes in the JET edge plasma

C Silva, G Arnoux, M Groth, C Hidalgo, S Marsen, JET-EFDA Contributors2013年Plasma Physics and Controlled FusionIF 2.2出版社

Fluctuations in the JET boundary plasma (from the scrape-off layer up to 1.5 cm inside the last closed flux surface) have been investigated using a multi-pin reciprocating Langmuir probe system. Coherent electrostatic fluctuations consistent with the geodesic acoustic mode (GAM) are observed in the edge plasma. The GAM properties and structure have been investigated and experimental evidence is presented suggesting an interaction between GAMs and the ambient turbulence.

日本語訳

JET境界プラズマ(スクレイプオフ層から最外殻磁気面の内側1.5 cmまで)における変動は、多ピン往復ラングミュアプローブシステムを用いて調査された。エッジプラズマにおいて、測地音響モード(GAM)と一致する静電的コヒーレント変動が観測された。GAMの特性と構造が調査され、GAMと周囲の乱流との間の相互作用を示唆する実験的証拠が提示された。

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JETEdge plasmaAcoustic modeGeodesic acoustic mode
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