Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm21a1669h&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM21A-1669
Physics
2700 Magnetospheric Physics (6939)
Scientific paper
Electromagnetic Ion Cyclotron (EMIC) waves play an important role in the Earth's Radiation Belts dynamics. Theoretical work has suggested EMIC waves may contribute significantly to Relativistic Electron Precipitation (REP) by pitch-angle scattering. We will be self-consistently simulating the EMIC instability, wave propagation, and wave-particle interaction using a hybrid code, in which ions are treated as super particles and electrons as a massless fluid. While most of the numerical simulations on EMIC waves have been done in Cartesian coordinates, we will carry on our simulation in generalized orthogonal curvilinear coordinates. The generalized coordinates fit better especially for geometries that have irregular boundary shapes, which is often the case in the Earth's radiation belts. An energy-conserving particle mover in curvilinear coordinates will be presented, as well as reflection boundary conditions for particles. We will also discuss the power spectrum method in Fourier space used to analyze the waves. Simulation results in different coordinates (e.g. Cartesian and dipole) of different dimensions (1D and 2D) will be presented to compare with linear theory.
Denton R.
Hu Yan
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