Generation of solar wind proton tails and double beams by Coulomb collisions

Details Generation of solar wind proton tails and double beams by Coulomb collisions Generation of solar wind proton tails and double beams by Coulomb collisions

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.7255l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, July 1, 1987, p. 7255-7261.

Physics

34

Coulomb Collisions, Ion Beams, Solar Protons, Solar Wind, Collisional Plasmas, Interplanetary Magnetic Fields, Solar Wind Velocity, Velocity Distribution

Scientific paper

A kinetic model is presented for the generation of proton heat flux tails and double beams by Coulomb collisions in the solar wind. The combined action of the large-scale interplanetary magnetic field (mirror effect) and of the collisional scattering (runaway) is shown to be able to produce variously skewed velocity distributions. All intermediate cases between the exospheric and isotropic adiabatic expansion can be simulated as a function of the collisionality of the plasma. Good qualitative agreement is achieved between in situ measurements and model results in the collisional domains of the solar wind.

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