Limitations of Two-Dimensional Model Equations for Ion-Acoustic Waves
Abstract
It is shown that plane ion-acoustic solitons are unstable in magnetized plasmas if the magnetic field is greater than a critical value which roughly corresponds to the condition that the soliton width equals the ion gyroradius. On the other hand, ion-acoustic solitons are stable if their amplitudes exceed a corresponding magnetic-field-dependent threshold. Limitations of previous models are discussed.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 1981
- DOI:
- 10.1103/PhysRevLett.47.719
- Bibcode:
- 1981PhRvL..47..719L
- Keywords:
-
- Ion Acoustic Waves;
- Magnetohydrodynamic Stability;
- Plane Waves;
- Solitary Waves;
- Two Dimensional Models;
- Wave Propagation;
- Numerical Analysis;
- Plasma Dynamics;
- Plasma Physics;
- 52.35.Mw;
- Nonlinear phenomena: waves wave propagation and other interactions