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GAM observation in the TUMAN-3M tokamak

V V Bulanin, L G Askinazi, A A Belokurov, V A Kornev, V Lebedev, A V Petrov, A S Tukachinsky, M I Vildjunas, F Wagner, A Yu Yashin2016年Plasma Physics and Controlled FusionIF 2.2出版社

Results of an experimental study of geodesic acoustic modes (GAM) in the TUMAN-3M tokamak are reported. With Doppler backscattering (DBS) the basic properties of the GAM such as frequency, conditions for the GAM existence and the GAM radial location have been identified. The two-frequency Doppler reflectometer system was employed to reveal an interplay between low frequency sheared poloidal rotation, ambient turbulence level and the GAM intensity. Bicoherence analysis of the DBS data evidences the presence of a nonlinear interaction between the GAM and plasma turbulence.

日本語訳

TUMAN-3Mトカマクにおける測地線音響モード(GAM)の実験的研究の結果を報告する。ドップラー後方散乱(DBS)により、GAMの基本特性、すなわち周波数、GAMの存在条件、およびGAMの径方向位置が特定された。二周波ドップラー反射計システムを用いて、低周波のシア状ポロイダル回転、周辺乱流レベル、およびGAM強度の間の相互作用を明らかにした。DBSデータのバイコヒーレンス解析は、GAMとプラズマ乱流の間の非線形相互作用の存在を示している。

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