# Effects of parallel ion motion on electromagnetic toroidal ion temperature gradient modes in a fluid model Journal article, 2015

Effects of ion dynamics along the background magnetic field have been added to an advanced fluid model which has been developed, tested, and successfully used in transport code applications during the last decades. Introducing electrostatic ($\phi$) and electromagnetic potentials ($\psi$), a system of two coupled second order differential equations in these potentials is derived. The mode solution is interpreted as a coupling between an Ion Temperature Gradient (ITG) mode and an ion motion driven acoustic wave. The mode may be stabilized by electromagnetic effects and by minimizing the ITG parameter ($\eta_i = L_n/L_{Ti}$). Interestingly, the addition of kinetic Landau resonance effects may enhance the $\eta_i$ stabilization.

ITG

electromagnetic effects

Drift waves

## Author

### Anders Jarmen

Chalmers, Earth and Space Sciences, Plasma Physics and Fusion Energy

### Johan Anderson

Chalmers, Earth and Space Sciences, Plasma Physics and Fusion Energy

### Plamen Malinov

Sofia University

#### Physics of Plasmas

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

Vol. 22 8 082508- 082508

### Subject Categories

Physical Sciences

Fusion, Plasma and Space Physics

Energy

Basic sciences

### DOI

10.1063/1.4928374