Electron geodesic acoustic modes in electron temperature gradient mode turbulence
Journal article, 2012

In this work, the first demonstration of an electron branch of the geodesic acoustic mode (el-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 el-GAMs driven nonlinearly by ETG modes is derived. A new saturation mechanism for ETG turbulence through the interaction with el-GAMs is found, resulting in a significantly enhanced ETG turbulence saturation level compared to the mixing length estimate.

Author

Johan Anderson

Chalmers, Earth and Space Sciences, Transport Theory

Hans Nordman

Chalmers, Earth and Space Sciences, Transport Theory

Raghvendra Singh

Institute for Plasma Research India

P.K. Kaw

Institute for Plasma Research India

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 19 8 082305

Areas of Advance

Energy

Roots

Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1063/1.4742321

More information

Created

10/8/2017