Parametric excitation of high‐frequency electromagnetic waves by the lower‐frequency dipole pumping

The possibility of parametric excitation of high‐frequency electromagnetic waves by lower‐frequency dipole pumping is studied. It is shown that the obtained general dispersive equation may be reduced to the Mathieu equation, provided the case of the flux instability is neglected. In the framework of the developed approach, the excitation of magnetohydrodynamic waves and whistler oscillations is examined.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70436/2/PFBPEI-5-1-92-1.pd

The effect of the hot, anisotropic magnetospheric protons on the dispersion relation

It is shown that the presence of hot, anisotropic protons of ring current in outer plasmasphere lead to the modification of the dispersion of A- and FMS-waves in the low frequency region. In this case, a periodic instability of A-waves is observed, and during their propagation, the change of polarization is possible. This can explain the presence of right-hand polarization waves in the ring current zone.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30856/1/0000519.pd

Saturation of Alfven oscillations in the ring current region due to generation of lower hybrid waves

The possibility of flux generation of lower hybrid oscillations in the ring current region of the Earth's magnetosphere is suggested in this paper. The energy level of lower hybrid oscillations can exceed the modulational instability threshold, which leads to the formation of caverns. The consequences of this are qualitatively analysed. Also, an assumption is made that the flux instability of lower hybrid oscillations may limit the level of Alfven oscillations in the ring current region.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30137/1/0000514.pd