Geomagnetic pulsation generation as a result of whistler wave scattering
- EES-8, MS D401, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)
Nonlinear scattering of whistler mode waves by kinetic Alfv{acute e}n waves (KAWs) is considered. The evolution of whistler mode wave decay instability in time and two spatial dimensions is studied under the approximation of two-fluid magnetohydrodynamics. It is shown that efficient coupling between whistler waves and KAWs is possible due to the finite Larmor radius effect for Alfv{acute e}n waves. The considered process can lead to significant enhancement of KAWs. The nonlinear scattering of whistler waves by KAWs is proposed as a possible mechanism of enhancement and generation of geomagnetic pulsations in the magnetosphere and ionosphere of the Earth. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 300149
- Journal Information:
- Physics of Plasmas, Vol. 6, Issue 1; Other Information: PBD: Jan 1999
- Country of Publication:
- United States
- Language:
- English
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