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arXiv · 1401.6300

Effects of the Second Harmonic on the GAM in Electron Scale Turbulence

Johan Anderson·Hans Nordman·Raghvendra Singh
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Abstract

The effects higher order harmonics have been self-consistently included in the derivation of the electron branch of the electron Geodesic Acoustic Mode (el-GAM) in an Electron-Temperature-Gradient (ETG) turbulence background. The work is based on a two-fluid model including finite $\beta$-effects while retaining non-adiabatic ions. In solving the linear dispersion relation, it is found that the due to the coupling to the $m=2$ mode the real frequency may be significantly altered and yield higher values.

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Johan Anderson, Hans Nordman, Raghvendra Singh. 2014-01-24. Effects of the Second Harmonic on the GAM in Electron Scale Turbulence. https://arxiv.org/abs/1401.6300

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