# Effects of parallel ion motion on electromagnetic toroidal ion temperature gradient modes in a fluid model Artikel i vetenskaplig tidskrift, 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

## Författare

#### Anders Jarmen

Chalmers, Rymd- och geovetenskap, Plasmafysik och fusionsenergi

#### Johan Anderson

Chalmers, Rymd- och geovetenskap, Plasmafysik och fusionsenergi

#### Plamen Malinov

Sofijski universitet

#### Physics of Plasmas

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

Vol. 22 8 082508- 082508

#### Ämneskategorier

Fysik

Fusion, plasma och rymdfysik

Energi

#### Fundament

Grundläggande vetenskaper

#### DOI

10.1063/1.4928374

2018-03-12