AAS 204th Meeting, June 2004
Session 72 Solar Input to the Heliosphere
SPD Poster, Thursday, June 3, 2004, 9:20am-4:00pm, Ballroom

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[72.01] Multiple Ions Resonant Heating and acceleration by Alfvén/cyclotron Fluctuations in the corona and the solar Wind

X. Hong, L. Ofman (Catholic University of America)

We study the interaction between protons, multiple minor ions (O5+, He++) and a given Alfvén/cyclotron fluctuations 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 how multiple minor species and the differential drift velocity may affect the resonance interaction between cyclotron waves and the solar wind protons. The results of the simulations provide a clear picture of wave-particle interaction under various plasma conditions, which can explain 1) how multiple minor ions affect the resonant heating of the coronal plasma and the solar wind by a given wave spectrum, relative drift velocity, and micro-instability; 2) how energy is distributed and transferred among waves and different ion species; 3) the growth and damping of different beam micro-instability modes, including both, right-hand and left-hand waves; 4) the formation of ion double-peak distribution and He++ anisotropy in the solar wind.

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