Finite Larmor Radius Effects in Ponderomotive Force

Details Finite Larmor Radius Effects in Ponderomotive Force Finite Larmor Radius Effects in Ponderomotive Force

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm11b0442n&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM11B-0442

Physics

2154 Planetary Bow Shocks, 2164 Solar Wind Plasma, 2728 Magnetosheath, 2731 Magnetosphere: Outer, 2784 Solar Wind/, Agnetosphere Interactions : : : : : : : : : : : : : : :, 2447 Modeling And Forecasting, 2451 Particle Acceleration, 2716 Energetic Particles, Precipitating, 2772 Plasma Waves And Instabilities

Scientific paper

The Ponderomotive Force (PF) due to a high frequency electromagnetic wave in a magnetized plasma is derived using a hybrid model that involves both the fluid and the kinetic approaches. We obtain an analytical expression for the PF using the fluid model and the hot plasma dielectric tensor [1] elements where the contribution of finite Larmor radius (FLR) are appropriately incorporated into the model. The contribution of FLR effects due to the Lorentz part of the PF are studied in greater detail. The PF could play a dominant role in the selective charged particle acceleration (energization) in the magnetospere, and possibly in the heliosphere, and in particular, perpendicular heating of ions. In such space plasma environments, the effects of FLR could be significant. Finally, the analytical expression for PF obtained by the above procedure is compared with the results derived from the equation of motion of a single charged particle in a magnetic field in the presence of an arbitrarily propagating electromagnetic wave. [1] J.R. Myra and D.A. D'Ippolito, Phys. Plasmas 7(2000)3600.

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