Acceleration of cometary H2O group pickup ions by obliquely propagating nonlinear magnetosonic waves

Details Acceleration of cometary H2O group pickup ions by obliquely propagating nonlinear magnetosonic waves Acceleration of cometary H2O group pickup ions by obliquely propagating nonlinear magnetosonic waves

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9821023s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A12, p. 21,023-21,037

Physics

3

Giacobini-Zinner Comet, Magnetoacoustic Waves, Magnetohydrodynamic Turbulence, Molecular Ions, Plasma Acceleration, Plasma-Particle Interactions, Solar Wind, Water, Wave Propagation, Interplanetary Magnetic Fields, Ion Beams, Landau Damping, Magnetosonic Resonance, Nonlinear Systems, Wave-Particle Interactions

Scientific paper

The observations made during the encounter with comet Giacobini Zinner show that the character of MHD turbulence is governed by the magnetosonic (MS) waves generated by the pickup ions via a resonant cyclotron instability. The interaction of cometary ions in the mass loaded solar wind with MS waves propagating away from the comet and oblique to the interplanetary magnetic field (IMF) is investigated using the test particle approach. Ion trajectories, distribution functions, widths of pitch angle scattering and energy diffusion are obtained. We have also investigated the relationship between pitch angle scattering and the three parameters, namely, alpha, the angle between the solar wind flow direction and the ambient magnetic field, thetaBK, the angle between the ambient magnetic field and the wave propagation vector, and the ion injection velocity.

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