Multiple ions resonant heating and acceleration by Alfvén/cyclotron fluctuations in the corona and the solar wind

Details Multiple ions resonant heating and acceleration by Alfvén/cyclotron fluctuations in the corona and the solar wind Multiple ions resonant heating and acceleration by Alfvén/cyclotron fluctuations in the corona and the solar wind

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10908103x&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A8, CiteID A08103

Physics

Plasma Physics

16

Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Nonlinear Phenomena, Space Plasma Physics: Turbulence

Scientific paper

We study the interaction between protons, multiple minor ions (O5+, He++), and a given Alfvén/cyclotron fluctuation spectra in the corona and the solar wind. One-dimensional hybrid simulations are performed in initially homogeneous, collisionless, magnetized plasma with waves propagating parallel to the background magnetic field. The self-consistent hybrid simulations and linear Vlasov theory are used to study the effect of the driving spectrum, ion drift velocity, and microinstabilities on the coronal plasma and solar wind heating. The simulation results provide a clear picture of wave-particle interaction and successfully explain (1) how the driving spectrum frequency range and the power law index affect the resonant heating, (2) how ion double-peak distribution is formed and how differential flows affect the resonant interaction via the change of the resonant wave dispersion relation, and (3) how local microinstabilities affect minor ion heating and constraint the values of plasma parameters observed in the solar wind.

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