Acceleration and heating of heavy ions in high speed solar wind streams

Details Acceleration and heating of heavy ions in high speed solar wind streams Acceleration and heating of heavy ions in high speed solar wind streams

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382..319g&link_type=abstract

Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 319

Physics

1

Solar Wind Plasma, Sources Of Solar Wind, Magnetohydrodynamic Waves

Scientific paper

We propose circularly polarized Alfvén waves generated in coronal holes as a possible mechanism to heat and accelerate heavy ions in the fast solar wind. As the solar wind expands, the Alfvén waves encounter first the gyrofrequency of the species with the largest Ml=ml/zlmp (ml is the ion mass, zl the degree of ionization, and mp the proton mass). As a result of resonance absorption, the ions are heated and accelerated by quasilinear resonant interaction. As the ions are accelerated, they reach a velocity at which the dispersion relation changes in such a way, that the Alfvén-like branch of the dispersion relation goes over the gyrofrequency of the species with the second largest Ml value. As the solar wind continues to expand, more and more of such channels open up, until all heavy ions are heated and accelerated.

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