Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..932..301g&link_type=abstract
TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS; 6th Annual International Astrophysics Conference. AIP Conference P
Astronomy and Astrophysics
Astrophysics
Mhd Waves, Plasma Waves, And Instabilities, Neutral Particles
Scientific paper
Intense Alfvenic turbulence is artificially induced by the release of neutral gas in the equatorial plane perpendicular to the ambient magnetic field. The free energy associated with he orbital motion of the released neutral atoms is the energy source of the Alfvenic turbulence. Ions resulting from the photo ionized neutrals form a ring type distribution in velocity that is highly unstable to shear Alfven waves near the ion cyclotron harmonics of the released species. The nonlinear evolution of the primary waves leads to redistribution of the wave energy in k-space and to excitation of secondary waves with characteristics appropriate for electron cyclotron resonance with the energetic electrons in the radiation belts that can induce intense pitch angle scattering of the trapped electrons.
Ganguli Gurudas
Mithaiwala Manish
Papadopoulos Dennis
Rudakov Leonid
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