Physics – Plasma Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983nascp.2280.355m&link_type=abstract
In JPL Solar Wind Five p 355-367 (SEE N84-13067 03-92)
Physics
Plasma Physics
3
Heliosphere, Magnetic Moments, Plasma Physics, Radial Velocity, Shapes, Solar Wind, Wind Velocity, Degrees Of Freedom, Magnetic Fields, Statistical Analysis, Velocity Distribution, Wave Propagation
Scientific paper
A survey of solar wind ion velocity distributions and derived parameters (temperature, ion differential speed, heat flux, adiabatic invariants) is presented with emphasis on the heliocentric distance range between 0.3 and 1 AU traversed by the Helios solar probe. The radial evolution of nonthermal features are discussed which are observed to be most pronounced at perihelion. Within the framework of quasilinear plasma theory, wave particle interactions that may shape the ion distributions are considered. Some results of a self consistent model calculation are presented accounting for ion acceleration and heating by resonant momentum and energy exchange with ion cyclotron and magnetosonic waves propagating away from the Sun along the interplanetary magnetic field. Another tentative explanation for the occurrence of large perpendicular proton temperatures is offered in terms of heating by Landau damping of lower hybrid waves.
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