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High Frequency Geod...
High Frequency Geodesic Acoustic Modes in Electron Scale Turbulence
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- Anderson, Johan, 1973 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nordman, Hans, 1957 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skyman, Andreas, 1982 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Singh, Raghvendra (author)
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Kaw, P.K. (author)
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(creator_code:org_t)
- 2012
- 2012
- English.
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In: Proceedings 24th IAEA FEC, San Diego 8-13 October 2012.
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Abstract
Subject headings
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- In this work the first demonstration of a high frequency branch of the geodesic acoustic mode (GAM) driven by electron temperature gradient (ETG) modes is presented. The work is based on a fluid description of the ETG mode retaining non-adiabatic ions and the dispersion relation for high frequency GAMs driven nonlinearly by ETG modes is derived. A new saturation mechanism for ETG turbulence through the interaction with high frequency GAMs is found, resulting in a significantly enhanced ETG turbulence saturation level compared to the mixing length estimate.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- ETG
- Turbulence
- GAMs
Publication and Content Type
- kon (subject category)
- ref (subject category)
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