75 research outputs found
An adaptive numerical method for the Vlasov equation based on a multiresolution analysis.
International audienceIn this paper, we present very first results for the adaptive solution on a grid of the phase space of the Vlasov equation arising in particles accelarator and plasma physics. The numerical algorithm is based on a semi-Lagrangian method while adaptivity is obtained using multiresolution analysis
Effect of temperature anisotropy on the dynamics of geodesic acoustic modes
In this work, we revisit the linear gyro-kinetic theory of geodesic acoustic
modes (GAMs) and derive a general dispersion relation for an arbitrary
equilibrium distribution function of ions. A bi-Maxwellian distribution of ions
is then used to study the effects of ion temperature anisotropy on GAM
frequency and growth rate. We find that ion temperature anisotropy yields
sensible modifications to both the GAM frequency and growth rate as both tend
to increase with anisotropy and these results are strongly affected by the
electron to ion temperature ratio
One-dimensional steady-state structures at relativistic interaction of laser radiation with overdense plasma for finite electron temperature
One-dimensional steady-state plasma-field structures in overdense plasma are
studied assuming that the electron temperature is uniform over plasma bulk and
the ions are stationary. It is shown that there may exist solutions for
electron distributions with cavitation regions in plasma under the action of
ponderomotive forceComment: 6 pages, 4 figure
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