Impurity effects on ion-drift-wave eigenmodes in a sheared magnetic field
Abstract
The stability of ion-drift-wave eigenmodes in a slab geometry with a sheared magnetic field is investigated. It is found that in contrast to the case of universal and dissipative electron-drift-wave eigenmodes, unstable impurity-driven normal modes can appear if specific conditions are satisfied. In addition, the influence of impurities on unstable ion-temperature-gradient-driven drift eigenmodes is also studied. It is found that, if their density profile is inwardly peaked, the impurities can exert a strong stabilizing influence on these modes.
- Publication:
-
Physics of Fluids
- Pub Date:
- January 1980
- DOI:
- 10.1063/1.862835
- Bibcode:
- 1980PhFl...23..167T
- Keywords:
-
- Impurities;
- Ion Temperature;
- Ionic Waves;
- Magnetohydrodynamic Stability;
- Plasma Cylinders;
- Density Distribution;
- Eigenvalues;
- Plasma Density;
- Slabs;
- Temperature Gradients;
- Plasma Physics