The coupling of Alfven and compressional waves
Abstract
The electromagnetic wave propagation characteristics in a two component plasma (cold and hot) in the presence of an inhomogeneous magnetic field is studied. An ion distribution with an anisotropy and a density gradient is used to obtain the dispersion equation by solving the Vlasov Equation and Maxwell Equations. Using the assumption that the ion Larmor radius is much smaller than the perpendicular wave length, the dispersion equation is solved in the limit of hydromagnetic frequecies. From the solutions of the dispersion equation, a new instability is found for Alfvenlike waves when the wave frequencies are less than the ion drift frequency. Alfvenlike wave polarization is studied for varying parameters of anisotropy and the coldtohot density ratio. Owing to the inhomogeneous density and high effects, Alfvenlike waves are found to couple to the drift mirror instability. It is proposed that the storm associated magnetic field oscillations with periods 100600 seconds might be caused by the coupling of Alfvenlike waves and the drift mirror instability.
 Publication:

Ph.D. Thesis
 Pub Date:
 August 1975
 Bibcode:
 1975PhDT........67L
 Keywords:

 Compression Waves;
 Magnetohydrodynamic Waves;
 Wave Interaction;
 Electromagnetic Radiation;
 Magnetic Fields;
 Plasmas (Physics);
 Wave Propagation;
 Communications and Radar