@InProceedings{AlvesBarbSimõ:2016:PaSiWa,
author = "Alves, Maria Virginia and Barbosa, Marcos Vinicius Grala and
Sim{\~o}es J{\'u}nior, Fernando J. L.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal
de Pelotas (UFPEL)}",
title = "Particle-in-cell Simulations of Waves in a Plasma Described by
Kappa Velocity Distribution as Observed in the Saturnīs
Magnetosphere",
year = "2016",
organization = "AGU Fall Meeting",
abstract = "Observations have shown that several regions in space plasmas
exhibit non-Maxwellian distributions with high energy superthermal
tails. Kappa velocity distribution functions can describe many of
these regions and have been used since the 60s. They suit well to
represent superthermal tails in solar wind as well as to obtain
plasma parameters of plasma within planetary magnetospheres. A set
of initial velocities following kappa distribution functions is
used in KEMPO1 particle simulation code to analyze the normal
modes of wave propagation. Initial conditions are determined using
observed characteristics for Saturnīs magnetosphere. Two electron
species with different temperatures and densities and ions as a
third species are used. Each electron population is described by a
different kappa index. Particular attention is given to
perpendicular propagation, Bernstein modes, and parallel
propagation, Langmuir and electron-acoustic modes. The dispersion
relation for the Bernstein modes is strongly influenced by the
shape of the velocity distribution and consequently by the value
of kappa index. Simulation results are compared with numerical
solutions of the dispersion relation obtained in the literature
and they are in good agreement.",
conference-location = "San Francisco",
conference-year = "12-16 dec.",
language = "en",
urlaccessdate = "27 abr. 2024"
}