Observation of geodesic acoustic modes in the JET edge plasma

C. Silva; G. Arnoux; M. Groth; C. Hidalgo; S. Marsen; JET-EFDA  Contributors

doi:10.1088/0741-3335/55/2/025001

Observation of geodesic acoustic modes in the JET edge plasma

C. Silva^*, G. Arnoux, M. Groth, C. Hidalgo, S. Marsen, JET-EFDA Contributors

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

26 Citations (Scopus)

Abstract

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.

Original language	English
Article number	025001
Pages (from-to)	1-6
Number of pages	6
Journal	Plasma Physics and Controlled Fusion
Volume	55
Issue number	2
DOIs	https://doi.org/10.1088/0741-3335/55/2/025001
Publication status	Published - Feb 2013
MoE publication type	A1 Journal article-refereed

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abstract = "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.",

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AU - Silva, C.

AU - Arnoux, G.

AU - Groth, M.

AU - Hidalgo, C.

AU - Marsen, S.

AU - Contributors, JET-EFDA

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AB - 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.

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Observation of geodesic acoustic modes in the JET edge plasma

Abstract

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