The nonlinear parametric interaction of Alfvén waves with magnetosonic and ion-acoustic waves is considered on the basis of two-fluid magnetohydrodynamics. A nonlinear dispersion relation describing three-wave interaction, instability growth rate have been calculated and estimated. The analysis of theoretical results shows that kinetic effects in the Alfvén waves (the finite ion Larmour radius) are essential for the parametric interactions of waves. Nonlinear parametric processes studied in the paper could take place in the solar coronal loops, where plasma parameter is small. The products of the decay - magnetosonic and ion-acoustic waves, can effectively heat the coronal plasma owing to rapid dissipation.
Kinematika i Fizika Nebesnykh Tel Supplement
- Pub Date:
- September 2000