Observation of geodesic acoustic modes in the JET edge plasma

Research output: Contribution to journalArticle


  • C. Silva
  • G. Arnoux
  • Mathias Groth

  • C. Hidalgo
  • S. Marsen
  • JET-EFDA Contributors

Research units

  • Culham Science Centre
  • Instituto Superior Tecnico Lisboa
  • Associacion Euratom/Ciemat
  • Max-Planck-Institut für Plasmaphysik


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 languageEnglish
Article number025001
Pages (from-to)1-6
Number of pages6
JournalPlasma Physics and Controlled Fusion
Issue number2
Publication statusPublished - Feb 2013
MoE publication typeA1 Journal article-refereed

ID: 4154091