Physics – Plasma Physics
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30ssc11d&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 21, pp. SSC 11-1, CiteID 2128, DOI 10.1029/2003GL017385
Physics
Plasma Physics
9
Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Charged Particle Motion And Acceleration, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Experimental And Mathematical Techniques, Space Plasma Physics: Nonlinear Phenomena
Scientific paper
It has been suggested that Magnetic Holes (MHs) are caused by perpendicular proton energization due to the Ponderomotive Force (PF) associated with phase steepened Alfvén waves. Here we include particle finite Larmor radius (FLR) effects and the effects of ion gyroharmonics in the PF expression. The general expression for the PF is derived by using the hot plasma dielectric tensor from kinetic theory. The fully kinetic expression has a multiple resonance character which is not revealed in the fluid picture. It will be shown that by including such effects, the expression for the PF will be significantly altered, both at the low frequency and high frequency limit. Also, an explicit analytic expression for the PF keeping only the first order FLR terms is given for conceptual purposes for the readers.
Dasgupta Basudeb
Janaki M. S.
Tsurutani Bruce T.
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